Cycad Literature

Author(s)	Year	Title	Publication	Comment(s)	Abstract
Abraham, A; Mathew, PM	1962	Cytological studies in the cycads: sex chromosomes in Cycas	Ann. Bot. (Oxford), n.s. 26(2): 261-266
Abraham, A; Mathew, PM	1966	Cytology of Encephalartos hildebrandtii A.Br. & Bouche	Ann. Bot. (Oxford), n.s. 30(2): 239-241
Ackery, PR; Nash, RJ; Bell, EA; Norstog, K	1993	Sequestration of MAM-Glycosides by insects	Proc. Second Int. Conf. Cycad Biol. : 3-7
Acuna-Castillo, RH	2010	A new species of Zamia (Zamiaceae) from Costa Rica	Brenesia 73-74: 29-33	Zamia gomeziana
Acuna-Castillo, RH; Gómez P., LD	2009	Selección de un lectotipo para Zamia fairchildiana L.D.Gómez (Zamiaceae)	Brenesia 71-72: 65-66
Acuna-Castillo, RH; Marin-Mendez, W	2013	Comparative anatomy of leaflets of Zamia acuminata and Z. pseudomonticola (Zamiaceae) in Costa Rica	Rev Biol Trop 61(2): 539-46		[Abstract]
Acuna-Castillo, RH; Marín-Méndez, WA	2012	Some aspects of the foliar anatomy of two Zamia species from Costa Rica: Z. fairchildiana L. D. Gómez and Z. neurophyllidia D. W. Stev.	Mem. New York Bot. Gard. 106: 192-203
Agoo, EM; Madulid, DA	2012	Cycas sancti-lasallei (Cycadaceae), a new species from the Philippines	Blumea 57(2): 131-133		[Abstract]
Agoo, EM; Madulid, DA	2012	Cycas sancti-lasallei (Cycadaceae), a new species from the Philippines	Blumea 57(2): 131-133		[Abstract]
Agoo, EMG; Madulid, DA; Callado, JR	2019	Novel species of Cycas (Cycadaceae) from Mindanao Island, Philippines	Mem. New York Bot. Gard. 117: 529-539	Cycas flabellata and C. mindanaensis protologues
Aguirre-Fey, D	2004	Demografía y Genética de Poblaciones de Zamia loddigesii Miq. (Zamiaceae) en el Centro de Veracruz, México	Facultad de Biología : 69
Ahern, CP; Staff, IA	1994	Symbiosis in cycads: the origin and development of coralloid roots in Macrozamia communis (Cycadaceae)	Amer. J. Bot. 81(12): 1559-1570
Aimee Caye, GC; Tao, C; Nan, L; Jun, D	2019	Perspectives on Endosymbiosis in Coralloid Roots: Association of Cycads and Cyanobacteria	Frontiers in Microbiology 10		[Abstract]
Aiton, W	1789	Palmae	Hort. Kew. (W. Aiton) 3: 473-479
Albretsen, JC; Khan, SA; Richardson, JA	1998	Cycad palm toxicosis in dogs: 60 cases (1987-1997)	J Am Vet Med Assoc 213(1): 99-101		[Abstract]
Alvarez-Quinto, RA; Lockhart, BEL; Fetzer, JL; Olszewski, NE	2020	Genomic characterization of cycad leaf necrosis virus, the first badnavirus identified in a gymnosperm	Archives of Virology: Official Journal of the Virology Division of the Internati 165(7): 1671		[Abstract]
Anderson, RC	2012	Growing Cycas cairnsiana in Arizona	Cycad Newslett. 35(1): 16
Applequist, WL	2012	Report of the Nomenclature Committee for Vascular Plants: 64	Taxon 61(5): 1108-1117
Archangelsky, AA; Archangelsky, S; Artabe, AE	1995	Cuticular characters adapted to volcanic stress in a new Cretaceous Cycad leaf from Patagonia, Argentina Considerations on the stratigraphy and depositional hist	Review Palaeobotany & Palynology 89(3-4): 213-233		[Abstract]
Archangelsky, S; Brett, DW	1963	Studies on Triassic fossil plants from Argentina	Ann. Bot. (Oxford), n.s. 27(1): 147-154
Archangelsky, S; Villar de Seoane, L	2004	Cycadean diversity in the Cretaceous of Patagonia, Argentina. Three new Androstrobus species from the Baqueró Group	Review Palaeobotany & Palynology 131(1-2): 1-28		[Abstract]
Argyros, N	2008	Dioon tomasellii	Cycad Newslett. 31(4): 10-12
Argyros, N	2010	Stangeria eriopus: Paradox - past and present	Cycad Newslett. 33(1): 8-13
Argyros, N	2012	Cycas cairnsiana	Cycad Newslett. 35(1): 10-15
Arnold, CA	1953	Origin and relationships of the cycads	Phytomorphology 3: 51-65
Artabe, AE	1999	A new Cycad stem from the Upper Cretaceous of Patagonia, Argentina	Boletim Simposio sobre Cretaceo Brasil 5: 309-313		[Abstract]
Artabe, AE; Stevenson, DW	1999	Fossil Cycadales of Argentina	Bot. Rev. (Lancaster) 65(3): 219-238
Ascherson, P	1878	Vorlage von mit Wolle eingeschleppten Pflanzen; Primula sisskimensis Hook. ; und von afrikanischen Pflanzen von H. Soyaux und Dr. Pogge.	Verh. Bot. Vereins Prov. Brandenburg	Encephalartos poggei protologue
Ash, SR	1979	Cycads of the Chinle Formation (Upper Triassic), southwestern United States; a summary	Series Botanical Soc. America 157: 30
Ash, SR	1991	A new pinnate cycad leaf from the Upper Triassic Chinle Formation of Arizona (USA)	Bot. Gaz. 152(3): 123-131
Atwood, S	1936	The anomalous root structure of Cycas revoluta	Amer. J. Bot. 23: 336-340
Audran, JC	1979	Microspores, pollen grains and tapetum ontogeny in Ceratozamia mexicana (Cycadaceae): an ultrastructural study.	Phytomorphology 29(3-4): 350-362
Avendaño, S; Vovides, AP; Castillo-Campos, G	2003	A new species of Ceratozamia (Zamiaceae, Cycadales) from Veracruz, Mexico	Bot. J. Linn. Soc. 141(3): 395-398	Ceratozamia huastecorum
Averyanov, LV; Nguyên, TH; Nguyên Sinh, K; Van Pham, T; Lamxay, V; Bounphanmy, S	2014	Gymnosperms of Laos	Nordic J. Bot. 32: 765-805	Cycas laotica protologue
Bailey, FM	1883	Macrozamia douglasii	Syn. Queensl. Fl. : 500	Macrozamia douglasii protologue
Bailey, FM	1886	Macrozamia mountperriensis	Syn. Queensl. Fl. Suppl. 1: 50	Macrozamia mountperriensis protologue
Bailey, FM	1898	Contributions to the flora of Queensland	Queensland Agric. J. 3: 353-356	Macrozamia platyrhachis protologue
Baillon, H	1894	Cycadacées	Hist. Pl. (Baillon) 12: 57-69	Stangeria eriopus protologue
Balick, MJ; Atha, D E	2000	Cycadophyta. In: Checklist of the vascular plants of Belize, with common names and uses	Mem. New York Bot. Gard. 85: 49
Bamigboye, SO; Tshisikhawe, MP	2020	The impacts of bark harvesting on a population of encephalartos transvenosus (Limpopo cycad), in Limpopo province, South Africa	Biodiversitas 21(1): 8-13
Bamigboye, SO; Tshisikhawe, MP; Taylor, PJ	2016	Revisión del riesgo de extinción de las Cícadas Africanas / Review of extinction risk in African Cycads	Phyton (Buenos Aires) 85(2): 333-336		[Abstract]
Bamps, PR; Lisowski, S	1990	A new species of Encephalartos (Zamiaceae) from Northeastern Zaire	Mem. New York Bot. Gard. 57: 152-155	Encephalartos ituriensis
Banack, SA; Cox, PA	2003	Biomagnification of cycad neurotoxins in flying foxes: implications for ALS-PDC in Guam	Neurology 61(3): 387-9		[Abstract]
Banack, SA; Cox, PA	2003	Distribution of the neurotoxic nonprotein amino acid BMAA in Cycas micronesica	Bot. J. Linn. Soc. 143(2): 165-168		[Abstract]
Bancroft, N	1914	Pteridosperm anatomy and its relation to that of the cycads	New Phytol. 13: 41-68
Bank, H van der; Wink, M; Vorster, PJ; Treutlein, J; Brand, L; Bank, M van der;	2001	Allozyme and DNA sequence comparisons of nine species of Encephalartos (Zamiaceae)	Biochem Syst Ecol 29(3): 241-266		[Abstract]
Baulina, O	2003	Atypical cell forms overproducing extracellular substances in populations of cycad cyanobionts	Microbiology 72(6): 701-712		[Abstract]
Beck, W	1992	Aboriginal preparation of Cycas seeds in Australia	Economic Botany 46: 133-147
Beck, W	1993	Cycas use by Australian aboriginal people	Proc. Second Int. Conf. Cycad Biol. : 8-15
Bell, EA	1993	From Lathyrus to Cycas: a search for dietary neurotoxins	Proc. Second Int. Conf. Cycad Biol. : 16-18
Bertolini, G	1851	Illustrazione di plante Mozambicesi	Mem. Reale Accad. Sci. Ist. Bologna 3: 249-267	Encephalartos ferox protologue
Bogler, DJ; Francisco-Ortega, J	2000	Phylogeny of the cycads (Cycadales) based on chloroplast DNA gene spacers and ITS rDNA sequences	Amer. J. Bot. 87(6): 260-273		[Abstract]
Bogler, DJ; Francisco-Ortega, J	2004	Molecular systematic studies in cycads: evidence from trnL intron and ITS2 rDNA sequences.	Bot. Rev. (Lancaster) 70(2): 260-273
Bonta, M	2003	Teocinte, 'Ear of God'	Cycad Newslett. 26(1): 7-12
Bonta, M	2007	Ethnobotany of Honduran cycads	Mem. New York Bot. Gard. 97: 120-142
Bonta, M	2012	Cycads and human life cycles: Outline of a symbology	Mem. New York Bot. Gard. 106: 133-150
Bonta, M; Osborne, R	2007	Cycads in the vernaculara compendium of local names	Mem. New York Bot. Gard. 97: 143-175
Bonta, M; Pulido-Silva, MT; Diego-Vargas, T; Vite-Reyes, A; Vovides, AP; Cibrián	2019	Ethnobotany of Mexican and northern Central American cycads (Zamiaceae)	J Ethnobiol Ethnomed 15(1): 4		[Abstract]
Borenstein, AR; Dahlquist, E; Wu, Y; Salmon, D; Gamst, A; Olichney, J; Thal, LJ;	2007	Cycad seed exposure and risk of dementia, MCI and ALS/PDC in the chamorro population of Guam	Neurology 68(12)
Borenstein, AR; Mortimer, JA; Schofield, E; Wu, Y; Salmon, DP; Gamst, A; Olichne	2007	Cycad exposure and risk of dementia, MCI, and PDC in the Chamorro population of Guam	Neurology 68(21): 1764-71		[Abstract]
Bork, J	1990	Developmental cycles in shoot growth of male Cycas circinalis	Amer. J. Bot. 77(8): 981-985
Borsboom, AC; Wang, J; Forster, PI	2015	Determining maturity and population structure in Macrozamia parcifolia (Zamiaceae), a threatened Australian cycad	Austral. J. Bot. Advance online publication. doi:		[Abstract]
Braun, A	1876	Ueber zwei von Hildebrandt angefiihrte Cycadeen nebst Bemerkungen iiber einige andere Cycadeen	Sitzungsber. Ges. Naturf. Freunde Berlin	Cycas seemannii protologue
Braun, AK	1875	Die Frage nach der Gymnospermie der Cycadeen, erläutert durch die Stellung dieser Familie im Stufengang des Gewächsreichs	Monatsber. Königl. Preuss. Akad. Wiss. Berlin : 289-377
Breckon, GJ; Negrón-Ortiz, V	1993	Pollination of Zamia pumila by fungus gnats	Amer. J. Bot. 70(5, part 2): 106-107
Brenner, ED; Martinez-Barboza, N; Clark, AP; Liang, QS; Stevenson, DW; Coruzzi,	2000	Arabidopsis mutants resistant to S(+)-beta-methyl-alpha, beta-diaminopropionic acid, a cycad-derived glutamate receptor agonist	Plant Physiol 124(4): 1615-24		[Abstract]
Brenner, ED; Stevenson, DW; Chiu, J; Runko, SJ; Palenchar, PM; Coruzzi, GM	2007	Defining the role of BMAA and its potential glutamate receptor targets in Arabidopsis thaliana and Cycas rumphii	Mem. New York Bot. Gard. 97: 236-252
Brenner, ED; Stevenson, DW; Katari, MS; McCombie, RW; Rudd, SA; Runko, SJ; Marti	2007	Genomic studies in Cycas rumphii Miquel	Mem. New York Bot. Gard. 97: 182-193
Brenner, ED; Stevenson, DW; McCombie, RW; Katari, MS; Rudd, SA; Mayer, KFX; Pale	2003	Expressed sequence tag analysis in Cycas, the most primitive living seed plant	Genome Biology 4(12)		[Abstract]
Brenner, ED; Stevenson, DW; Twigg, RW	2003	Cycads: evolutionary innovations and the role of plant-derived neurotoxins	Trends Plant Sci 8(9): 446-52		[Abstract]
Britten, L; Brueckner, A; Christian, HB; Dyer, RA; Henderson, MD; Killick, DJB;	1954	Newly described species	Bothalia 6(2): 415-454
Britton, NL	1907	Contributions to the flora of the Bahama Islands	Bull. New York Bot. Gard. 5(18): 311-318	Zamia lucayana protologue
Britton, NL	1908	Botanical Exploration in Jamaica	J. New York Bot. Gard. 9(101): 81-90
Britton, NL	1916	Studies of West Indian Plants. 51 undescribed species from the Isle of Pines, Cuba	Bull. Torrey Bot. Club 43(9): 462-469
Britton, NL	1926	Cycadales.	Botany of Porto Rico and the Virgin Islands. Scientific Survey of Porto Rico and 6(3): 329-331
Brongniart, A	1846	Note sur un nouveau genre de Cycadees du Mexique	Ann. Sci. Nat., Bot. sér. 3, 5: 5-10	Ceratozamia mexicana protologue
Brongniart, AT	1846	Sur un noveau genre de cycadées du Mexique	Ann. Sci. Nat., Bot. sér. 3, 5: 5-9
Broome, T	2001	Optimizing cycad seed germination	Cycad Newslett. 24(2)
Broome, T	2002	A celebration of red and brown emergent cycads	Cycad Newslett. 25(2): 4-7
Broome, T	2003	Growing Cycas panzhihuaensis in Florida	Cycad Newslett. 26(4): 11
Broome, T	2004	Encephalartos ferox in Florida	Cycad Newslett. 27(3): 10
Broome, T	2004	Growing Lepidozamia peroffskyana in Florida	Cycad Newslett. 27(1): 13
Broome, T	2004	Growing Zamia splendens in Central Florida	Cycad Newslett. 27(2): 12
Broome, T	2005	Zamia pygmaea in Central Florida	Cycad Newslett. 28(1): 10-11
Broome, T	2006	Growing Cycas debaoensis in Central Florida	Cycad Newslett. 29(1): 13
Broome, T	2006	Growing Macrozamia moorei in Central Florida	Cycad Newslett. 29(2,3): 18
Broome, T	2006	Zamia muricata in Central Florida	Cycad Newslett. 29(4): 11
Broome, T	2007	Encephalartos turneri in Central Florida	Cycad Newslett. 30(2): 14
Broome, T	2007	Growing Dioon merolae in Central Florida	Cycad Newslett. 30(1): 10
Broome, T	2007	Growing Microcycas in Central Florida	Cycad Newslett. 30(4): 21
Broome, T	2008	Growing Zamia floridana	Cycad Newslett. 31(2,3): 10-11
Broome, T	2009	Growing Lepidozamia hopei in Florida	Cycad Newslett. 32(4): 12
Broome, T	2009	Growing Zamia erosa and Z. pumila in central Florida	Cycad Newslett. 32(2,3): 5-6
Broome, T	2010	Growing Encephalartos sclavoi in Central Florida	Cycad Newslett. 33(2): 19
Broome, T	2010	Growing Stangeria eriopus in Central Florida	Cycad Newslett. 33(1): 13
Broome, T	2013	Growing Zamia elegantissima in Florida	Cycad Newslett. 35-36(4,1): 21
Broome, T; Nazor, C	2013	Cycas micholitzii and C. bifida - Two Cycas bamboo mimics of Southeast Asia	Cycad Newslett. 36(2,3): 6-12
Brown, R	1810	Cycadeae	Prodr. Fl. Nov. Holland. 1: 346-348
Brown, WH; Kienholz, JR	1925	Cycas chamberlainii, a new species	Philipp. J. Sci. 26: 47-52
Brownson, DM; Mabry, TJ; Leslie, SW	2002	The cycad neurotoxic amino acid, beta-N-methylamino-L-alanine (BMAA), elevates intracellular calcium levels in dissociated rat brain cells	J Ethnopharmacol 82(2-3): 159-67		[Abstract]
Bruce, TA; Brueckner, A; Dyer, RA; Kies, P; Verdoorn, IC	1951	Newly described species	Bothalia 6(1): 213-248
Bryan, GS	1936	Fascicled roots of Cycas revoluta	Amer. J. Bot. 23: 334-335
Bryan, GS	1952	The cellular proembryo of Zamia and its cap cells	Amer. J. Bot. 39: 433-443
Bryan, GS; Evans, RI	1957	Types of development from the central nucleus of Zamia umbrosa	Amer. J. Bot. 44: 404-415
Bull, W	1879	Ceratozamia fuscoviridis	Retail List [Bull] 154: 4	Ceratozamia fuscoviridis protologue
Bull, W	1881	Zamia prasina	Retail List [Bull] 176: 20
Burbridge, AH; Whenlan, RJ	1982	Seed dispersal in a cycad, Macrozamia riedlei	Austral. J. Ecol. 7(1): 63-67
Burch, DG	1981	The propagation of cycads - a game for young people?	Proc. Florida State Hort. Soc. 94: 216-218
Burtt Davy, J	1926	A manual of the flowering plants and ferns of the Transvaal with Swaziland, South Africa. Part I: Pteridophyta to Bombacaceae	Man. Pl. Transvaal [Burtt Davy]
Butt, LP	1993	The genus Cycas and cycad conservation in Australia guide lines	Proc. Second Int. Conf. Cycad Biol. : 317-321
Byrne, M; James, SH	1991	Genetic diversity in the cycad Macrozamia riedlei	Heredity 67(1): 35-40
Byrne, M; James, SH	1993	Genetic diversity in the cycad Macrozamia riedlei	Proc. Second Int. Conf. Cycad Biol. : 75-76
Byrne, M; Waycott, M; Hobbs, AA; James, SH	1997	Variation in ribosomal DNA within and between populations of Isotoma petraea and Macrozamia riedlei	Heredity 79: 573-583		[Abstract]
Cabrera, H; Sandoval, Z E; Guzman, M J M; Mata, R M; Cruz, S F; Chavez, VM; Litz	2007	Micropropagation of the medicinal plant Dioon merolae (Zamiaceae, Cycadales), an endangered cycad species.)	Planta Medica 73(9): 1016-1016
Cabrera-Toledo, D; González-Astorga, J; Nicolalde-Morejón, F; Vergara-Silva, F;	2010	Allozyme diversity levels in two congeneric Dioon spp. (Zamiaceae, Cycadales) with contrasting rarities	Pl. Syst. Evol. 290: 115-125
Cabrera-Toledo, D; González-Astorga, J; Vovides, AP; Casas, A; Vargas-Ponce, O;	2019	Surviving background extinction: Inferences from historic and current dynamics in the contrasting population structures of two endemic Mexican cycads	Population Ecology 61(1): 62-73		[Abstract]
Cafasso, D; Cozzolino, S; Caputo, P; De Luca, P	2001	Maternal inheritance of plastids in Encephalartos Lehm. (Zamiaceae, Cycadales)	Genome 44(2): 239-41		[Abstract]
Cafasso, D; Cozzolino, S; De Luca, P; Chinali, G	2003	An unusual satellite DNA from Zamia paucijuga (Cycadales) characterised by two different organisations of the repetitive unit in the plant genome	Gene 311: 71-9		[Abstract]
Caiola, MG	1975	A light and electron microscopic study of the blue-green algae growing in the coralloid roots of Encephalartos altensteinii and in culture	Phycologia 14(1): 25-33		[Abstract]
Calderón, E; Stevenson, DW	2003	Una nueva especie del género Zamia L. (Zamiaceae), de los Andes de Colombia y clave actualizada para las especies del género en Colombia	Revista Acad. Colomb. Ci. Exact. 27(105): 485-490
Caldwell, OW	1907	Microcycas calocoma	Bot. Gaz. 44: 118-141
Caldwell, OW; Baker, CF	1907	The identity of Microcycas calocoma	Bot. Gaz. 43: 330-335
Calonje, C	2010	Cold winter precedes mast coning year for female Cycas panzhihuaensis plants at Montgomery Botanical Center	Encephalartos 102: 7-10
Calonje, C; Calonje, M	2010	Germination and Early Seedling Growth of Rare Zamia spp. in Organic and Inorganic Substrates: Advancing Ex Situ Conservation Horticulture	HortScience 45(4): 679-683		[Abstract]
Calonje, M	2007	History, growth rate and phenology of Microcycas calocoma in South Florida	Cycad Newslett. 30(4): 20-21
Calonje, M	2007	Phenology of Dioon merolae	Cycad Newslett. 30(1): 11
Calonje, M	2009	A new cliff-dwelling species of Zamia (Zamiaceae) from Belize	J. Bot. Res. Inst. Texas 3(1): 23-39	Zamia meermanii	[Abstract]
Calonje, M	2011	Phenology of Cycas revoluta in South Florida	Cycad Newslett. 34(2,3): 42-43
Calonje, M	2011	Propagation of cycad collections from seed: applied reproductive biology for conservation	Sibbaldia 9: 77-96
Calonje, M; Calonje, A	2005	Zamia encephalartoides in the Chicamocha canyon	Cycad Newslett. 28(3-4): 8-11
Calonje, M; Calonje, C	2012	Phenology of Dioon spinulosum in South Florida	Cycad Newslett. 35(2): 15
Calonje, M; Calonje, C; Cuestas, S	2016	In search of the world's most massive seed cone	Encephalartos 124: 12-14
Calonje, M; Castro Hernández, J; Coca, LF; Jaramillo, D; Aristizábal, A	2021	Two new species of Zamia (Zamiaceae, Cycadales) from the Magdalena-Uraba moist forests ecoregion of northern Colombia	Phytotaxa 497(1): 1-19	Zamia imbricata protologue
Calonje, M; Esquivel, HE; Morales, G; Mora-Lizcano, YA	2012	A new arborescent species of Zamia (Cycadales, Zamiaceae) from the department of Huila, eastern cordillera of Colombia	Caldasia 34(2): 283-290	Zamia huilensis
Calonje, M; Esquivel, HE; Stevenson, DW; Calonje, C; Pava, D	2011	A new arborescent species of Zamia from the Central Cordillera of Tolima, Colombia (Cycadales, Zamiaceae), with comments on the Z. poeppigiana species complex	Brittonia 63(4): 442-451	Zamia tolimensis
Calonje, M; López-Gallego, C; Castro Hernández, J	2018	Zamia paucifoliolata, a new species of Zamia (Zamiaceae, Cycadales) from Valle del Cauca, Colombia	Phytotaxa 385(2): 85-93		[Abstract]
Calonje, M; Meerman, J	2009	What is Zamia prasina (Zamiaceae: Cycadales)?	J. Bot. Res. Inst. Texas 3(1): 43-49		[Abstract]
Calonje, M; Meerman, J; Griffith, MP; Hoese, G	2009	A new species of Zamia (Zamiaceae) from the Maya Mountains of Belize	J. Bot. Res. Inst. Texas 3(1): 31-41	Zamia decumbens
Calonje, M; Meerow, AW	2010	The typification of Zamia erosa and the priority of that name over Z. amblyphyllidia	Taxon 59(2): 637-642
Calonje, M; Meerow, AW; Griffith, MP; Salas-Leiva, D; Vovides, AP; Coiro, M; Fra	2019	A Time-Calibrated Species Tree Phylogeny of the New World Cycad Genus Zamia L. (Zamiaceae, Cycadales)	International Journal of Plant Sciences 180(4): 286-314		[Abstract]
Calonje, M; Meerow, AW; Knowles, L; Knowles, D; Griffith, MP; Nakamura, K; Franc	2013	Cycad biodiversity in the Bahamas Archipelago and conservation genetics of the threatened Zamia lucayana (Zamiaceae)	Oryx 47(2): 190-198
Calonje, M; Morales, G; López-Gallego, C; Roldán, FJ	2015	A taxonomic revision of Zamia montana and Zamia oligodonta, with notes on their conservation status	Phytotaxa 192(4): 279-289
Calonje, M; Sennikov, A	2017	In the process of saving plant names from oblivion: The revised nomenclature of Ceratozamia fuscoviridis (Zamiaceae)	Taxon 66(1): 158-164
Calonje, M; Stevenson, DW; Calonje, C; Ramos, YA; Lindström, AJ	2010	A new species of Zamia from Choco, Colombia (Cycadales, Zamiaceae)	Brittonia 62(1): 80-85	Zamia pyrophylla
Calonje, M; Taylor, AS; Stevenson, DW; Holzman, G; Ramos, YA	2012	Zamia lindleyi: A misunderstood species from the highlands of Western Panama	Mem. New York Bot. Gard. 106: 419-437
Cameron, A	2009	Encephalartos kisambo in cultivation - Athi River, Kenya	Cycad Newslett. 32(1): 17-18
Cameron, A	2010	Visiting Encephalartos kisambo in habitat	Cycad Newslett. 33(4): 12-14
Cao, JGB, W M; Dai, SJ	2003	Ultrastructure of the blepharoplast and the multilayered structure in spermatogenesis in Osmunda cinnamomea var. asiatica	Acta Bot. Sin. 45(7): 832-842		[Abstract]
Capela, P	2007	In the field with Encephalartos turneri	Cycad Newslett. 30(2): 12-13
Caputo, P; Cozzolino, S; Gaudio, L; Moretti, A; Stevenson, DW	1996	Karyology and phylogeny of some Mesoamerican species of Zamia (Zamiaceae).	Amer. J. Bot. 83(11): 1513-1520
Caputo, P; Cozzolino, S; Luca, PD; Moretti, A; Stevenson, DW	2004	Molecular phylogeny of Zamia (Zamiaceae)	Cycad Classific. Concepts & Recommend. : 149-157		[Abstract]
Caputo, P; Marquis, C; Wurtzel, T; Stevenson, DW; Wurtzel, ET	1993	Molecular biology in cycad systematics	Proc. Second Int. Conf. Cycad Biol. : 213-219
Caputo, P; Stevenson, DW; Wurtzel, ET	1991	A phylogenetic analysis of American Zamiaceae (Cycadales) using chloroplast DNA restriction fragment length polymorphisms	Brittonia 43(3): 135-143
Cardini, F	2005	Carotenoid composition and its chemotaxonomic significance in leaves of ten species of the genus Ceratozamia (Cycads)	Journal of Plant Physiology 162(5): 517-528		[Abstract]
Cardini, F; Britton, G; Selva, A	1989	A seco-carotenoid from leaves of two cycads	Phytochemistry 28(10): 2793-2795
Cardini, F; Ginanneschi, M; Selva, A; Chelli, M	1987	Semi-ß-carotenone from leaves of two cycads	Phytochemistry 26(7): 2029-2031
Carpenter, RJ	1991	Macrozamia from the early tertiary of Tasmania and a study of the cuticles of extant species	Austral. Syst. Bot. 4(2): 433-444
Carruthers, W	1893	On Cycas taiwaniana sp. nov. and C. seemanii A. Br.	J. Bot. 31: 1-3
Carson, JL; Wallace, JW	1972	The detection of C-glycosylflavones in Dioon spinulosum.	Phytochemistry 11(2): 842-843
Castillo-Guevara, C	2002	Is cycasin in Eumaeus minyas (Lepiodoptera : Lycaenidae) a predator deterrent?	Interciencia 27(9): 465
Castillo-Guevara, C	2007	Herbivores and chemical defenses in cycadsan ecological and evolutionary approach	Mem. New York Bot. Gard. 97: 87-103
Castillo-Lara, P; Octavio-Aguilar, P; De-Nova, JA	2018	Ceratozamia zaragozae Medellín-Leal (Zamiaceae), an endangered Mexican cycad: New information on population structure and spatial distribution	Brittonia 70(2): 155		[Abstract]
Chadwick, CE	1993	The roles of Tranes lyterioides and T. sparsus Boh (col., Curculiodidae) ini the pollination of Macrozamia communis (Zamiaceae)	Proc. Second Int. Conf. Cycad Biol. : 77-88
Chalapathi Rao, PV; Sivaram Prasad, NV; Madhu Babu, P; Prasad, K; Prasanna, PV	2016	Cycas seshachalamensis (Cycadaceae), a new cycad from Andhra Pradesh, India	Asian J. Conserv. Biol. 5(1): 55-58	Cycas seshachalamensis protologue
Chamberlain, CJ	1906	Preliminary note on Ceratozamia	Bot. Gaz. 43: 137
Chamberlain, CJ	1906	The ovule and female gametophyte of Dioon	Bot. Gaz. 42: 321-358
Chamberlain, CJ	1908	Report on Dioon and Ceratozamia	Science 27: 333
Chamberlain, CJ	1909	Dioon spinulosum	Bot. Gaz. 48: 401-413
Chamberlain, CJ	1909	Spermatogenesis in Dioon edule	Bot. Gaz. 47: 215-236
Chamberlain, CJ	1910	Fertilization and embryogeny in Dioon edule.	Bot. Gaz. 50: 415-429
Chamberlain, CJ	1911	The adult cycad trunk.	Bot. Gaz. 52: 81-104
Chamberlain, CJ	1912	Morphology of Ceratozamia	Bot. Gaz. 53: 1-19
Chamberlain, CJ	1912	Two species of Bowenia	Bot. Gaz. 54: 419-423
Chamberlain, CJ	1912	Two species of Bowenia. Contributions from the Hull Botanical Laboratory 162	Bot. Gaz. 54: 419-424	Bowenia serrulata protologue
Chamberlain, CJ	1913	Macrozamia moorei, a connecting link between living and fossil cycads	Bot. Gaz. 55: 141-154
Chamberlain, CJ	1916	Stangeria paradoxa	Bot. Gaz. 61: 353-372
Chamberlain, CJ	1919	The Living Cycads	Liv. Cycads
Chamberlain, CJ	1920	The living cycads and the phylogeny of seed plants.	Amer. J. Bot. 7(4): 146-153
Chamberlain, CJ	1926	Hybrids in cycads	Bot. Gaz. 81: 401-418
Chamberlain, CJ	1926	Two new species of Zamia	Bot. Gaz. 81(2): 218-227	Zamia monticola & Zamia sylvatica
Chamberlain, CJ	1935	Cycadophytes - Cycadales. IN: Gymnosperms: Structure and Evolution
Chang, DCN; Grobbelaar, N; Coetzee, J	1988	SEM observations on cycanobacteria-infected cycad coralloid roots	S. African J. Bot. 54(5): 491-495
Chang, SS; Chan, YL; Wu, ML; Deng, JF; Chiu, T; Chen, JC; Wang, FL; Tseng, CP	2004	Acute Cycas seed poisoning in Taiwan	J Toxicol Clin Toxicol 42(1): 49-54		[Abstract]
Chaplot, BB; Jasrai, YT	2000	Differentiation of shoot buds in bulb-scale cultures of Cycas revoluta Thunb.	Phytomorphology 50(1): 37-40
Charltoon, TS; Marini, AM; Markey, SP; Norstog, K; Duncan, MW	1992	Quantification of the neurotoxin 2-amino-3-(methylamino)-propanoic acid (BMAA) in Cycadales	Phytochemistry 31(10): 3429-3432
Chaves Guevara, R; Ferrer, Y	2007	Some news of Microcycas in Cuba	Cycad Newslett. 30(4): 10-14
Chávez González, AD; Rendón Aguilar, B; Luna José, AdL	2007	Ecología de Ceratozamia aff. robusta en la Sierra Madre del Sur de Oaxaca	Mem. New York Bot. Gard. 97: 73-86
Chavez, VM; Litz, RE; Monroy, M; Moon, PA; Vovides, AP	1998	Regeneration of Ceratozamia euryphyllidia (Cycadales, Gymnospermae) plants from embryogenic leaf cultures derived from mature-phase trees	Plant Cell Rep 17(8): 612-616		[Abstract]
Chavez, VML, R E	1999	Organogenesis from megagametophyte and zygotic embryo explants of the gymnosperm Dioon edule Lindley (Zamiaceae, Cycadales)	Plant Cell Tissue and Organ Culture 58(3): 219-222		[Abstract]
Chaw, SM; Walters, TW; Chang, CC; Hu, SH; Chen, SH	2005	A phylogeny of cycads (Cycadales) inferred from chloroplast matK gene, trnK intron, and nuclear rDNA ITS region	Mol Phylogenet Evol 37(1): 214-34		[Abstract]
Chemnick, J	2003	Notes on Ceratozamia hildae	Cycad Newslett. 26(2): 13
Chemnick, J	2004	Notes on Encephalartos ferox	Cycad Newslett. 27(3): 8-9
Chemnick, J	2005	In the field with Ceratozamia euryphyllidia	Cycad Newslett. 28(2): 10-13
Chemnick, J	2007	Seed dispersal agents of two Mexican cycads	Mem. New York Bot. Gard. 97: 104-119
Chemnick, J	2012	Dioon spinulosum in Habitat	Cycad Newslett. 35(2): 9-10
Chemnick, J	2014	The Kei River cycad figuratively and literally	Cycad Newslett. 37(1): 4-5
Chemnick, J; Gregory, TJ	1996	A new species of Ceratozamia (Zamiaceae) from Oaxaca, Mexico with comments on distribution, habitat, and relationships	Phytologia 79(1): 51-57	Ceratozamia whitelockiana
Chemnick, J; Gregory, TJ; Salas-Morales, S	1998	Ceratozamia mixeorum (Zamiaceae), a new species from Oaxaca, Mexico with comments on distribution, habitat, and species relationships	Phytologia 83(1): 47-52	Ceratozamia mixeorum protologue
Chemnick, J; Gregory, TJ; Salas-Morales, SH	1998	A revision of Dioon tomasellii (Zamiaceae) from western Mexico, a range extension of D. merolae, and clarification of D. purpusii	Phytologia 83(1): 1-6
Chemnick, J; Pérez-Farrera, MA	2007	Dioon merolae De Luca, Sabato & Vázquez-Torres - its history, ethnobotany and conservation	Cycad Newslett. 30(2): 8-10
Chen, CJ	1999	Cycadaceae	Flora of China, vol. 4, Cycadaceae through Fagaceae : 1-7
Chen, CJ	1999	Taxonomical and biogeographical studies on Cycas L. (Cycadaceae) in China	Biology and Conservarion of Cycads - Proceedings of the Fourth International Con : 116-128		[Abstract]
Chen, CJ; Liu, N	2004	New discoveries of cycads and advancement of conservation of cycads in China	Bot. Rev. (Lancaster) 70(1): 93-100
Chen, CJ; Stevenson, DW	1999	Cycadaceae, in Flora of China eds C. Y. Wu and P. Raven (Beijing: Science Press/Saint Louis, MO: Missouri Botanical Garden Press)	Fl. China 4: 1-7
Chen, CJ; Stevenson, DW	2004	Comments on Cycas, Dyerocycas, and Epicycas	Cycad Classific. Concepts & Recommend. : 57-68
Chen, CJ; Yang, SY	1994	Cycas multipinnata C.J. Chen et S.Y Yang--a remarkable new cycad from China.	Acta Phytotax. Sin. 32(5): 239	Cycas multipinnata protologue
Chen, KM; Craig, UK; Lee, CT; Haddock, R	2002	Cycad neurotoxin, consumption of flying foxes, and ALS/PDC disease in Guam	Neurology 59(10): 1664-5
Cheng, WC; Fu, LK; Cheng, CY	1975	Gymnosperma Sinicae	Acta Phytotax. Sin. 13(4): 81-82	Cycas szechuanensis protologue
Chirgwin, SK	1993	Studies of Cycas in Australia's Northern Territory	Proc. Second Int. Conf. Cycad Biol. : 220-227
Chirgwin, SK; Wigston, D	1993	A new species of Cycas from the Northern Territory	J. Adelaide Bot. Gard. 15(2): 147-148	Cycas conferta
Choi, JS; Friedman, WE	1991	Development of the pollen tube of Zamia furfuracea (Zamiaceae) and its evolutionary implications.	Amer. J. Bot. 78(4): 544-560
Chrysler, MA	1926	Vascular tissues of Microcycas calocoma.	Bot. Gaz. 82(3): 233-252
Chrysler, MA	1937	Persistent juveniles among the cycads.	Bot. Gaz. 98(4): 696-710
Cibrián-Jaramillo, A; Daly, AC; Brenner, E; Desalle, R; Marler, TE	2010	When North and South don't mix: genetic connectivity of a recently endangered oceanic cycad, Cycas micronesica, in Guam using EST-microsatellites	Mol. Ecol. 19(12): 2364-79		[Abstract]
Citlalli, C-G; Victor, R-G	2003	The Role of Macrozamin and Cycasin in Cycads (Cycadales) as Antiherbivore Defenses	J. Torrey Bot. Soc. 130(3): 206		[Abstract]
Claassen, I	2000	Focus on Encephalartos senticosus	Encephalartos 63: 4-10
Clark, DB; Clark, DA; Grayum, MH	1992	Leaf demography of a neotropical rain forest cycad, Zamia skinneri (Zamiaceae).	Amer. J. Bot. 79(1): 28-33
Clark, P	2004	Stalking the elusive coonties of historic Cedar Key	Cycad Newslett. 27(3): 12-14
Clugston, JAR; Griffith, MP; Kenicer, GJ; Husby, CE; Calonje, MA; Stevenson, DW;	2016	Zamia (Zamiaceae) Phenology in a Phylogenetic Context: Does in Situ Reproductive Timing Correlate with Ancestry?	Edinburgh J. Bot. 73(3): 345-370		[Abstract]
Clugston, JAR; Kenicer, GJ; Milne, R; Overcast, I; Wilson, TC; Nagalingum, NS	2019	RADseq as a valuable tool for plants with large genomesA case study in cycads	Molecular Ecology Resources 19(6): 1610-1622		[Abstract]
Coiro, M; Chomicki, G; Doyle, JA	2018	Experimental signal dissection and method sensitivity analyses reaffirm the potential of fossils and morphology in the resolution of the relationship of angiospe	Paleobiology 44(3): 490-510		[Abstract]
Coiro, M; Pott, C	2017	Eobowenia gen. nov. from the Early Cretaceous of Patagonia: indication for an early divergence of Bowenia?	BMC Evol Biol 17(1): 97		[Abstract]
Collins, M	1987	International protection of cycads	Fairchild Trop. Gard. Bull. 42(3): 28-29
Condamine, FL; Nagalingum, NS; Marshall, CR; Morlon, H	2015	Origin and diversification of living cycads: a cautionary tale on the impact of the branching process prior in Bayesian molecular dating	BMC Evol Biol 15(1): 65		[Abstract]
Connell, SW; Ladd, PG	1993	Pollination biology of Macrozamia riedlei - The role of insects	Proc. Second Int. Conf. Cycad Biol. : 96-102
Conran, JG; Bannister, JM; Kaulfuss, U; Lee, DE	2020	Pterostoma neehoffii (cf. Zamiaceae): a new species of extinct cycad from the middle Miocene of New Zealand and an overview of fossil New Zealand cycads	New Zealand Journal of Botany 58(1): 30-47		[Abstract]
Contreras Medina, R; Morrone, J J	1999	Biogeographic analysis of the genera of Cycadales and Coniferales (Gymnospermae): A panbiogeographic approach	Biogeographica Paris 75(4): 163-176		[Abstract]
Contreras Medina, R; Ruiz-Jimenez, CA; Luna Vega, I	2003	Caterpillars of Eumaeus childrenae (Lepidoptera: Lycaenidae) feeding on two species of cycads (Zamiaceae) in the Huasteca region, Mexico	Rev Biol Trop 51(1): 201-3		[Abstract]
Contreras, CM; Saavedra, MV; Martinez-Mota, L; Ortiz, M; Vazquez-Torres, M	1998	Crude preparations of Dioon spinulosum dyer neurotoxicity: methylazoxymethanol produces petil mal seizures in susceptible individuals	Phytomedicine 5(3): 227-33		[Abstract]
Cook, OF; Collins, GN	1903	Economic plants of Porto Rico	Contr. U.S. Natl. Herb. 8(2): 57-269
Cooper, MRG, D	2004	The cycads and cycad moths of K waZulu-Natal	Not given
Costa, J; Lindblad, P	1999	Cyanobiont diversity within coralloid roots of selected cycad species	Fems Microbiology Ecology 28(1): 85-91		[Abstract]
Coulter, JM	1909	Evolutionary tendences among Gymnosperms.	Bot. Gaz. 48: 81-97
Coulter, JM; Chamberlain, CJ	1903	The embryogeny of Zamia	Bot. Gaz. 35: 184-193
Coulter, JM; Chrysler, MA	1904	Regeneration in Zamia.	Bot. Gaz. 38: 452-458
Cousins, SR; Williams, VL; Witkowski, ETF	2012	Uncovering the cycad taxa (Encephalartos species) traded for traditional medicine in Johannesburg and Durban, South Africa	South African J. Botany 78: 129-138		[Abstract]
Cox, PA	2002	Cycad neurotoxin, consumption of flying foxes, and ALS/PDC disease in Guam - Reply	Neurology 59(10): 1664-1665
Cox, PA; Banack, SA; Murch, SJ	2007	Cyanobacteria, cycads, and the neurodegenerative disease among the Chamorro people of Guam	Mem. New York Bot. Gard. 97: 253-285
Cox, PA; Murch, S J	2003	Biomagnification of cyanobacterial neurotoxins and neurodegenerative disease among the Chamorro people of Guam	Proc. Natl. Acad. Sci. U.S.A. 100(23)		[Abstract]
Cox, PA; Murch, S; Sacks, O	2006	Commentary on: return of the cycad hypothesis - does the amyotrophic lateral sclerosis/Parkinsonism dementia complex (ALS/PDC) of Guam have new implications for	Neuropathology and Applied Neurobiology 32(6): 679-682
Crisp, MD; Cook, LG	2011	Cenozoic extinctions account for the low diversity of extant gymnosperms compared with angiosperms	New Phytol. 192(4): 997-1009		[Abstract]
Crosiers, C	1995	Ex situ pollination and multiplication of Encephalartos laurentianus De Wild (Zamiaceae, Cycadales)	Biodiversity and Conservation 4(7): 767-775		[Abstract]
Crouch, NR; Donaldson, J; Smith, GF; Symmonds, R; Dalzell, C; Scott-Shaw, C	2000	Ex situ conservation of Stangeria eriopus (Stangeriaceae) at the Durban Botanic Gardens, South Africa	Encephalartos 63: 16-24
Daday, A; Smith, GD	1987	The hydrogenase-nitrogenase relationship in a symbiotic cycanobacterium isolated from Macrozamia communis L. Johnson	Austral. J. Pl. Physiol. 14(3): 319-324
Dalzell, C	2008	Encephalartos horridus in situ	Cycad Newslett. 31(1): 8
Dammer, CL	1907	Cycadaceae. In: Ule, E. (ed.) II. Beiträge zur flora der hylaea nach den sammlungen von Ules Amazonas-expedition	Verh. Bot. Vereins Prov. Brandenburg 48: 117-118
Das, B; Mahender, G; Koteswara Rao, Y; Prabhakar, A; Jagadeesh, B	2005	Biflavonoids from Cycas beddomei	Chem Pharm Bull (Tokyo) 53(1): 135-6		[Abstract]
de Candolle, AL	1868	Cycadaceae	Prodr. [A. P. de Candolle] 16(2): 522-548
de Laubenfels, DJ	2007	Cycas truncata de Laub., a long-known but not validly described species	Encephalartos 92: 17
de Laubenfels, DJ; Adema, F	1998	A taxonomic revision of the genera Cycas and Epicycas gen. nov. (Cycadaceae)	Blumea 43(2): 351-400
De Luca, A.Moretti, Sabato & Vázq.Torres	1980	Dioon rzedowskii (Zamiaceae), a new species from Mexico	Brittonia 32(2): 225-229
De Luca, P	1990	A historical perspective on cycads from antiquity to the present	Mem. New York Bot. Gard. 57: 1-7
De Luca, P; La Valva, V; Sabato, S	1980	Spermatogenesis and tissue formation in cycad pollen grains.	Caryologia 33(2): 261-265
De Luca, P; Moretti, A; Sabato, S; Siniscalco Gigliano, G	1980	The ubiquity of cycasin in cycads	Phytochemistry 19(10): 2230-2231
De Luca, P; Moretti, A; Sabato, S; Siniscalco Gigliano, G	1982	A comparative study of cycad mucilages.	Phytochemistry 21(7): 1609-1611
De Luca, P; Sabato, S	1979	Dioon califanoi (Zamiaceae), a new species from Mexico	Brittonia 31(1): 170-173
De Luca, P; Sabato, S	1979	In vitro spermatogenesis of Encephalartos Lehm	Caryologia 32(2): 241-245
De Luca, P; Sabato, S; Vázquez-Torres, M	1980	Dioon caputoi (Zamiaceae), a new species from Mexico	Brittonia 32(1): 43-46
De Luca, P; Sabato, S; Vázquez-Torres, M	1981	Dioon holmgrenii (Zamiaceae), a new species from Mexico	Brittonia 33(4): 552-555
De Luca, P; Sabato, S; Vázquez-Torres, M	1981	Dioon merolae (Zamiaceae), a new species from Mexico	Brittonia 33(2): 179-185
De Luca, P; Sabato, S; Vázquez-Torres, M	1982	Distribution and variation of Dioon [Dion] edule	Brittonia 34(3): 355-362
De Luca, P; Sabato, S; Vázquez-Torres, M	1984	Dion tomasellii (Zamiaceae), a new Species with two varieties from Western Mexico	Brittonia 36(3): 223-227
de Vriese, WH	1838	Novae species Cycadearum Africae Australis, quas dcscriptionibus et figuris illustravit	Tijdschr. Natuurl. Gesch. Physiol. 4: 409-425
Dehgan, B	1983	Propagation and growth of cycads - a conservation strategy	Proc. Florida State Hort. Soc. 96: 137-139
Dehgan, B	1987	Research on Cycadales at the Horticultural Systematics Laboratory of the University of Florida.	Fairchild Trop. Gard. Bull. 42(3): 10-11
Dehgan, B	1995	The few, the proud, the cycads	Amer. Nurseryman Dec 15: 78-84
Dehgan, B	1996	Permian permanence	Amer. Nurseryman Jan 15: 66-74
Dehgan, B; Almira, F	1993	Horticultural practices and conservation of cycads	Proc. Second Int. Conf. Cycad Biol. : 322-328
Dehgan, B; Almira, F	1995	Plant growth regulator induced branching in cycads	Amer. J. Bot. 82(suppl.): 30
Dehgan, B; Almira, F; Dudeck, A; Schutzman, B	2004	Effects of varying shade and fertilizer on growth of Zamia floridana A.DC.	Bot. Rev. (Lancaster) 70(1): 79-85
Dehgan, B; Caballero-Ruano, M	1999	Propagation and culture of cycads: a practical approach. Proceedings of the Second International Symposium on Ornamental Palms and other Monocots from the Tropics, Tenerife, Spain (1997).	Acta Hort. 486: 123-131
Dehgan, B; Durando, JE; Yeager, TH	1994	Symptoms and treatment of manganese deficiency in Cycas revoluta Thunb.	HortScience 29(6): 645-648
Dehgan, B; Schutzman, B	1983	Effect of H2SO4 and GA3 on seed germination of Zamia furfuracea	HortScience 18(3): 371-372
Dehgan, B; Schutzman, B; Almira, F	1993	Utilization of scanning electron microscopy in the study of surface features in Cycadales	Proc. Second Int. Conf. Cycad Biol. : 228-235
Dehgan, B; Yuen, CKKH	1983	Seed morphology in relation to dispersal, evolution and propagation of Cycas L.	Bot. Gaz. 144(3): 412-418
del Risco, E; Morell, J; Samek, V	1984	Some annotations on Microcycas calocoma	Revista Jard. Bot. Nac. Univ. Habana 5(1): 111-132
Delange, Y	1990	Notes on the natural history of two species of Encephalartos from South Africa	Mem. New York Bot. Gard. 57: 142-143
Delevoryas, T	1970	Contributions to our knowledge of Triassic Cycadales	Amer. J. Bot. 57(6-2): 758
Delevoryas, T	1993	Origin, evolution and growth patterns of cycads	Proc. Second Int. Conf. Cycad Biol. : 236-245
Devred, R	1958	Une Cycadacée nouvelle du Congo Belge: Encephalartos marunguensis Devred	Bull. Soc. Roy. Bot. Belgique 91: 104-110	Encephalartos marunguensis protologue
Dietrich, A	1851	Bericht uber zwei neue Zamien, nebft ubbilbung berfelben	Allg. Gartenzeitung 19: 145-146	Zamia lindleyi and Z. skinneri protologues
Dixon, D	2004	A Review of the Gymnosperms of the Northern Territory	Beagle 20: 1-24
Dodson, CH	1998	A new species of Zamia (Zamiaceae) from Ecuador	Novon 8(1): 12-14	Zamia gentryi
Donaldson, J	1992	Adaptation for oviposition into concealed cycad ovules in the cycad weevils Antliarhinus zamiae and Antiliarhinus signatus (Coleoptera: Curculionoidea).	Bot. J. Linn. Soc. 47(1): 23-35
Donaldson, J	1993	Insect predation of ovules in the South African species of Encephalartos (Cycadales: Zamiaceae)	Proc. Second Int. Conf. Cycad Biol. : 103-108
Donaldson, J	1995	Life history and host range of the leopard magpie moth, Zerenopsis leopardina Felder (Lepidoptera: Geometridae)	African Entomology 3(2): 103-110		[Abstract]
Donaldson, J	1997	Is there a floral parasite mutualism in cycad pollination? The pollination biology of Encephalartos villosus (Zamiaceae).	Amer. J. Bot. 84(10): 1398-1406
Donaldson, J	1999	Changes in the abundance of South African cycads during thr 20th century - preliminary data from the study of matched photographs	Biology and Conservarion of Cycads - Proceedings of the Fourth International Con : 240-247
Donaldson, J	2003	Cycads. status survey and conservation action plan	Not given : 86
Donaldson, J	2003	Introduction	Cycads: Status, Survey, and Conservation Action Plan : 1-2
Donaldson, J	2004	Saving ghosts. The implications and uncertainty and shifting infrageneric concepts in the cycadales for red listing and conservation planning	Cycad Classific. Concepts & Recommend. : 13-22
Donaldson, J	2007	Hot and smelly sex! Theoretical considerations of the adaptive significance of cone thermogenesis and volatile odors in cycad reproduction	Mem. New York Bot. Gard. 97: 308-325
Donaldson, J; Hill, KD; Stevenson, DW	2003	Cycads of the World: an overview	Cycads: Status, Survey, and Conservation Action Plan : 3-8
Donnell Smith, J	1903	Undescribed plants from Guatemala and other Central American Republics XXIV	Bot. Gaz. 35(1): 1-9	Zamia tuerckheimii protologue
Donnell Smith, J	1903	Undescribed plants from Guatemala and other Central American Republics. XXIV.	Bot. Gaz. 35(1): 1-80
Dorety, HA	1908	The embryo of Ceratozamia: a physiological study	Bot. Gaz. 45: 412-416
Dorety, HA	1908	The seedling of Ceratozamia.	Bot. Gaz. 46: 203-220
Dorety, HA	1909	The extrafascicular cambgium of Ceratozamia	Bot. Gaz. 47: 150-152
Dorety, HA	1909	Vascular anatomy of the seedling of Microcycas calocoma	Bot. Gaz. 47: 139-147
Dorety, HA	1919	Embryo and seedling of Dioon spinulosum	Bot. Gaz. 67: 251-257
Dorsey, BL; Gregory, TJ; Sass, C; Specht, CD	2018	Pleistocene diversification in an ancient lineage: a role for glacial cycles in the evolutionary history of Dioon Lindl. (Zamiaceae)	Amer. J. Bot. 105(9): 1512-1530		[Abstract]
Douwes, E	2002	Gene-banking the Natal Grass Cycad - Stangeria eriopus	Biosphere Environmental Newspaper 1(6): 10-11
Douwes, E; Dalzell, C	2007	The ethnomedicinal use of cycads in South Africa	Mem. New York Bot. Gard. 97: 176-181
Dower, BL; Bateman, RM; Stevenson, DW	2004	Systematics, ontogeny, and phylogenetic implications of exceptional anatomically preserved cycadophyte leaves from the middle Jurassic of Bearreraig Bay, Skye, Northwest Scotland	Bot. Rev. (Lancaster) 70(2): 105-120
Downie, DA; Donaldson, J	2007	Molecular systematics in amorphocerine weevils on Encephalartospreliminary results	Mem. New York Bot. Gard. 97: 372-387
Downie, DG	1928	Male gametophyte of Microcycas calocoma	Bot. Gaz. 85: 437-450
Ducke, A	1915	Plantas nouvelles ou peu connues de la région amazonienne: Cycadaceae	Arch. Jard. Bot. Rio de Janeiro 1: 9-10
Ducke, A	1922	Plantes nouvelles ou peu connues de la région Amazonienne (IIe Partie). Cycadaceae	Arch. Jard. Bot. Rio de Janeiro 3: 19-20
Duncan, MW	1993	Cycads as a possible cause of neurological disorders in the Western Pacific	Proc. Second Int. Conf. Cycad Biol. : 19-23
Dyer, RA	1951	Encephalartos umbeluziensis	Fl. Pl. Africa 28: 1100	Encephalartos umbeluziensis protologue
Dyer, RA	1956	A new cycad from the Cape Province	J. S. African Bot. 22(1): 1-4	Encephalartos arenarius
Dyer, RA	1964	Cycadaceae	Bothalia 8(2): 169-170	Encephalartos inopinus protologue
Dyer, RA	1964	Notes and new records of African plants. Cycadaceae	Bothalia 8(2): 163-181
Dyer, RA	1965	New species and notes on type specimens of South African Encephalartos	J. S. African Bot. 31(2): 111-121	Protologue(s): Encephalartos princeps; New combination(s): Encephalartos trispinosus
Dyer, RA	1971	A further new species of Cycad from the Transvaal	Bothalia 10(2): 379-383
Dyer, RA	1972	A new species of Encephalartos from Swaziland	Bothalia 10(4): 539-546	Encephalartos heenanii
Dyer, RA; Verdoorn, IC	1951	Encephalartos natalensis	Bothalia 6(1): 205-211
Dyer, RA; Verdoorn, IC	1966	Zamiaceae	Fl. S. Africa [ed. L.E.W. Codd et al.] 1: 4-34
Dyer, RA; Verdoorn, IC	1969	Encephalartos manikensis and its near allies	Kirkia 7(1): 147-158
Eckenwalder, JE	1980	Taxonomy of the West Indian cycads	J. Arnold Arbor. 61: 701-722
Edmonson, N	1987	Growing cycads in the South Florida landscape.	Fairchild Trop. Gard. Bull. 42(3): 30-33
Edwards, I	1985	Conservation of plants on Mulanje Mountain Malawi	Oryx 19(2): 86-90		[Abstract]
Eichler, AW	1863	Cycadeae: Zamia	Fl. Bras. (Martius) 4(1): 410-416
Eichler, AW	1883	Ein neues Dioon (Dioon spinulosum Dyer.)	Gart.-Zeitung (Berlin) 2: 411-413
Eising, K	2009	Lepidozamia hopei in habitat - Cow Bay, Queensland, Australia	Cycad Newslett. 32(4): 12-14
Eizirik, DL; Kisby, GE	1995	Cycad toxin-induced damage of rodent and human pancreatic beta-cells	Biochem Pharmacol 50(3): 355-65		[Abstract]
Ekue, MRMG, O; Holscher, D; Sinsin, B; Finkeldey, R	2008	Population genetics of the cycad Encephalartos barteri ssp barteri (Zamiaceae) in Benin with notes on leaflet morphology and implications for conservation	Belgian Journal of Botany 141(1): 78-94		[Abstract]
Ellstrand, NC; Ornduff, R; Clegg, JM	1990	Genetic structure of the Australian cycad Macrozamia communis (Zamiaceae).	Amer. J. Bot. 77(5): 677-681
Emshousen, CM, C; Glenn, H	2004	Management of Cycad Aulacaspis Scale, Aulacaspis yasumatsui Takagi	Proc. Fla. State Hort. Soc. 117: 305-307
Erdei, B; Calonje, M; Hendy, A; Espinoza, N	2018	A review of the Cenozoic fossil record of the genus Zamia L. (Zamiaceae, Cycadales) with recognition of a new species from the late Eocene of Panama - evolution	Bulletin of Geosciences 93(2): 185-204		[Abstract]
Erdei, B; Coiro, M; Miller, I; Johnson, KR; Griffith, MP; Murphy, V	2019	First cycad seedling foliage from the fossil record and inferences for the Cenozoic evolution of cycads	Not given 15
Erdei, B; Hendy, AJW; Calonje, M; Espinoza, N	2017	The First Fossil Record of the Genus Zamia L. (Zamiaceae, Cycadales) Evidenced by Epidermal Structure from the Eocene of Panama and Its Comparison with Modern Sp	The Paleontological Society Special Publications 13: 18-18
Esclaire, F; Kisby, G; Spencer, P; Milne, J; Lesort, M; Hugon, J	1999	The Guam cycad toxin methylazoxymethanol damages neuronal DNA and modulates tau mRNA expression and excitotoxicity	Exp Neurol 155(1): 11-21		[Abstract]
Faden, RB; Beentje, HJ	1989	Encephalartos kisambo, a new cycad from Kenya, with a note on E. tegulaneus	Utafiti 2(1)
Fanan, W	1996	Studies on the resources and classification of the wild cycads from Guangxi (I)	Guihaia 16(1): 1-2	Cycas sexseminifera protologue
Fawcett, PKS; Norstog, K	1993	Zamia pumila in South Florida: a preliminary report on its pollinators R. slossoni, a snout weevil, and P. zamiae, a clavicorn beetle	Proc. Second Int. Conf. Cycad Biol. : 109-120
Feng, X; Liu, J; Gong, X	2016	Species delimitation of the Cycas segmentifida complex (Cycadaceae) resolved by phylogenetic and distance methods	Front. Plant Sci. 7(134): 1-11
Fisher, JB; Vovides, AP	2004	Mycorrhizae are present in cycad roots.	Bot. Rev. (Lancaster) 70(1): 16-23
Fitzgerald, WV	1918	The botany of the Kimberleys, north-west Australia	J. Proc. Roy. Soc. Western Australia 3: 102-224	Cycas furfuracea protologue
Flores-Vázquez, JC; Salas-Morales, SH; Saynes-Vásquez, A	2007	The populations of Dioon caputoi in the Tehuacán-Cuicatlán biosphere reserve	Mem. New York Bot. Gard. 97: 388-399
Flores-Vázquez, JC; Valverde, T; Lucas-González, JL	2012	How critical are the early life-cycle stages in the population ecology of cycads? A case study with Dioon merolae in Southeastern Mexico	Mem. New York Bot. Gard. 106: 40-58
Forrester, MB; Layton, GM; Varney, SM	2020	Cycas revoluta (sago cycad) exposures reported to Texas poison centers	American Journal of Emergency Medicine 38(8): 1611-1615
Forster, PI	1995	Cycas desolata (Cycadaceae), a new species from North Queensland	Austrobaileya 4(3): 345-352		[Abstract]
Forster, PI	1999	(1415) Proposal to conserve the name Encephalartos miquelii (Zamiaceae) with a conserved type	Taxon 48(3): 569-570
Forster, PI	1999	Proposal to conserve the name Encephalartos miquelii (Zamiaceae) with a conserved type	Taxon 48(3)
Forster, PI	1999	Typification and application of the name Macrozamia macleayi Miq (Zamiaceae)	Austrobaileya 5(3): 577
Forster, PI	2001	Cycas cupida (Cycadaceae), a new species from central Queensland	Austrobaileya 6(1): 153-160
Forster, PI	2005	Cycas scratchleyana F.Muell. (Cycadaceae), a new species record for Queensland and Australia	Austrobaileya 7(1): 229-230
Forster, PI	2007	Recovery plans for endangered cycads: a model set of objectives and actions using the example of Cyccas megacarpa from Queensland, Australia	Mem. New York Bot. Gard. 97: 3-31
Forster, PI	2011	Cycas terryana P.I.Forst. (Cycadaceae), a new species from central Queensland	Austrobaileya 8(3): 356-363
Forster, PI; Gray, B	2017	Cycas distans P.I.Forst. & B.Gray (Cycadaceae), a new species from southern Cape York Peninsula, Queensland	Austrobaileya 10(1): 74-84	Cycas distans protologue
Forster, PI; Osborne, R	2001	Focus on Macrozamia longispina	Encephalartos 66: 8-15
Forster, PI; Osborne, R	2003	Focus on Macrozamia cardiacensis	Encephalartos 75: 8-13
Forster, PIM, P J	1994	Cycad host plants for Lilioceris nigripes (Fabricius) (Coleoptera: Chrysomelidae) and Theclinesthes onycha (Hewitson) (Lepidoptera: Lycaenidae)	Australian Entomologist 21(3): 99-102		[Abstract]
Foster, AS	1939	Structure and growth of the shoot apex of Cycas revoluta	Amer. J. Bot. 26: 372-385
Foster, AS	1940	Further studies on zonal structure and growth of the shoot apex of Cycas revoluta	Amer. J. Bot. 27: 487-501
Foster, AS	1941	Zonal structure of the shoot apex of Dioon edule	Amer. J. Bot. 28: 557-564
Foster, AS	1943	Zonal structure and growth of the shoot apex in Microcycas calocoma (Miq)A.DC	Amer. J. Bot. 30: 56-73
Franz, NMS, P E	2008	Pharaxonotha portophylla (Coleoptera: Erotylidae), new species and pollinator of Zamia (Zamiaceae) in Puerto Rico	Caribbean Journal of Science 44(3): 321-333		[Abstract]
Frasier, RL	2004	Lepidozamia peroffskyana in Austin, Texas	Cycad Newslett. 27(1): 13
Frasier, RL	2007	My personal experience with Dioon merolae in Texas	Cycad Newslett. 30(1): 11
Fu, GA	2006	A new species of Cycas (Cycadaceae) from Hainan Island	Bull. Bot. Res., Harbin 26(1): 2-3	Cycas shanyaensis (as 'shanyagensis'])
Gardner, CA	1923	Botanical notes	Bull. Forest. Dept. W. Australia. 32: 30-32	Cycas basaltica and C. lane-poolei protologues
Gardner, CA	1930	Enumeratio Plantarum Australiae Occidentalis: A Systematic Census of the Plants occurring in Western Australia	Enum. Pl. Austral. Occ. : 3	Macrozamia riedlei & M. dyeri protologues
Garruto, RM; Yanagihara, R; Gajdusek, DC	1988	Cycads and amyotrophic lateral sclerosis/parkinsonism dementia	Lancet 2(8619): 1079		[Abstract]
Gary, WW	2002	Insect Pollination in the Cycad Genus Bowenia Hook. ex Hook. f. (Stangeriaceae)	Biotropica 34(3): 438		[Abstract]
Gaudio, L; Esposito, E; Siniscalco Gigliano, G; Caputo, P; Muoi, R; Moretti, A	1993	PGM polymorphism in cycads	Proc. Second Int. Conf. Cycad Biol. : 246-247
Giddy, C	1990	Focus on Encephalartos ngoyanus	Encephalartos 23: 4-9
Giddy, C	1992	Focus on Encephalartos cerinus	Encephalartos 32: 4-7
Giddy, C	1993	Cycad conservation legislation - does it work in South Africa?	Proc. Second Int. Conf. Cycad Biol. : 329-334
Gilliland, HB	1939	A note on the Rhodesian Cycad	Proc. Rhodesia Sci. Assoc. 37: 133-134	Encephalartos manikensis protologue
Gobe, GC	1994	Apoptosis in brain and gut tissue of mice fed a seed preparation of the cycad Lepidozamia peroffskyana	Biochem Biophys Res Commun 205(1): 327-33		[Abstract]
Golding, J	2003	A Red List account of Africa's cycads and implications of considering life-history and threats	Biodiversity and Conservation 12(3): 507-528		[Abstract]
Gómez P., LD	1982	Plantae mesoamericanae novae II	Phytologia 50(6): 401-404
Gómez, LD	1993	Birds as short range seed dispersers of Zamia fairchildiana in SW Costa Rica	Revista Biologia Tropical 41(3): 905-906
Gonzales, F	2004	Herbivoria en una gimnosperma endemica de Colombia, Zamia encephalartoides (Zamiaceae) por parte de Eumaeus (Lepidoptera: Lycaenidae)	Rev. Acad. Colombiana Cienc. 28(107): 233-243
González, D; Vovides, AP	2002	Low intralineage divergence in Ceratozamia (Zamiaceae) detected with nuclear ribosornal DNA ITS and chloroplast DNA trnL-F non-coding region	Syst. Bot. 27(4): 654-661		[Abstract]
González, D; Vovides, AP; Barcenas, C	2008	Phylogenetic relationships of the neotropical genus Dioon (Cycadales, Zamiaceae) based on nuclear and chloroplast DNA sequence data	Syst. Bot. 33(2): 229-236		[Abstract]
González-Astorga, J; Vovides, AP	2007	Genetic structure and diversity of Dioon edule: a comparison with other cycads	Mem. New York Bot. Gard. 97: 400-417
González-Astorga, J; Vovides, AP; Cabrera-Toledo, D; Nicolalde-Morejón, F	2008	Diversity and genetic structure of the endangered cycad Dioon sonorense (Zamiaceae) from Sonora, Mexico: Evolutionary and conservation implications	Biochemical Systematics and Ecology 36(12): 891-899		[Abstract]
González-Astorga, J; Vovides, AP; Cruz-Angon, A; Octavio-Aguilar, P; Iglesias, C	2005	Allozyme variation in the three extant populations of the narrowly endemic cycad Dioon angustifolium Miq. (Zamiaceae) from North-eastern Mexico	Ann. Bot. (Oxford), n.s. 95(6): 999-1007
González-Astorga, J; Vovides, AP; Ferrer, MM; Iglesias, CG	2003	Population genetics of Dioon edule Lindl. (Zamiaceae, Cycadales): biogeographical and evolutionary implications.	Bot. J. Linn. Soc. 80(3): 457-467
González-Astorga, J; Vovides, AP; Iglesias, CG	2003	Morphological and geographic variation of the cycad Dioon edule Lindl. (Zamiaceae): ecological and evolutionary implications	Bot. J. Linn. Soc. 141(4): 465-470
Gonzalez-Astorga, J; Vovides, AP; Nicolalde-Morejón, F; Cabrera-Toledo, D; Pérez	2008	Diversity and genetic structure of three species of Dioon Lindl. (Zamiaceae, Cycadales) from the Pacific seaboard of Mexico	Biological Journal of the Linnean Society 94(4): 765-776		[Abstract]
González-Astorga, J; Vovides, AP; Octavio-Aguilar, P; Aguirre-Fey, D; Nicolalde-	2006	Genetic diversity and structure of the cycad Zamia loddigesii Miq. (Zamiaceae): implications for evolution and conservation	Bot. J. Linn. Soc. 152(4): 533-544
González-Géigel, L	2003	Zamiaceae	Flora de la República de Cuba 4(8): 3-22
Gorelick, R; Fraser, D; Zonneveld, BJM; Little, DP	2014	Cycad (Cycadales) Chromosome Numbers Are Not Correlated with Genome Size	International Journal of Plant Sciences 175(9): 986-997		[Abstract]
Gorelick, R; Fraser, D; Zonneveld, BJM; Little, DP	2014	Cycad (Cycadales) chromosome numbers are not correlated with genome size	Int. J. Pl. Sci. 175(9): 986-997
Gorelick, R; Olson, K	2011	Is lack of cycad (Cycadales) diversity a result of a lack of polyploidy?	Bot. J. Linn. Soc. 165(2): 156-167		[Abstract]
Gorelick, R; Osborne, R	2007	Evolution of dioecy and sex chromosomes in cycads	Mem. New York Bot. Gard. 97: 326-334
Gorelick, RO, R	2002	Inducing sex change and organogenesis from tissue culture in the endangered African cycad Encephalartos woodii (Cycadales, Zamiaceae)	South African Journal of Science 98(3-4): 114-117
Gould, RE	1971	Lyssoxylon grigsbyi, a cycad trunk from the upper Triaasic of Arizona and New Mexico.	Amer. J. Bot. 58(3): 239-248
Gregory, TJ	2003	Dioon holmgrenii, then and now	Cycad Newslett. 26(3): 5-7
Gregory, TJ; Chemnick, J; Salas-Morales, SH; Vovides, AP	2003	A new species in the genus Dioon (Zamiaceae) from north-central Oaxaca, Mexico	Bot. J. Linn. Soc. 141(4): 471-476	Dioon argenteum
Gregory, TJ; Osborne, R	2008	Dioon tomasellii De Luca, Sabato & Vázq. Torres - history, ecology, ethnobotany and conservation status	Cycad Newslett. 31(4): 13-14
Gregory, TJ; Salas-Morales, SH	2008	Focus on Dioon argenteum	Encephalartos 93: 10-13
Griffith, MP; Calonje, M; Meerow, AW; Francisco-Ortega, J; Knowles, L; Aguilar,	2017	Will the same ex situ protocols give similar results for closely related species?	Biodiversity and Conservation 26(12): 2951-2966		[Abstract]
Griffith, MP; Calonje, M; Meerow, AW; Tut, F; Kramer, AT; Hird, A; Magellan, TM;	2015	Can a Botanic Garden Cycad Collection Capture the Genetic Diversity in a Wild Population?	International Journal of Plant Sciences 176(1): 1-10		[Abstract]
Griffith, MP; Calonje, M; Stevenson, DW; Husby, CE; Little, DP	2012	Time, place, and relationships: Cycad phenology in a phylogenetic and biogeographic context	Mem. New York Bot. Gard. 106: 59-81
Griffith, MP; Magellan, TM; Tomlinson, PB	2014	Variation in Leaflet Structure in Cycas (Cycadales: Cycadaceae): Does Anatomy Follow Phylogeny and Geography?	International Journal of Plant Sciences 175(2): 241-255		[Abstract]
Griffith, W	1854	Cycadaceae	Not. Pl. Asiat. 4(1): 1-17
Griffiths, AD; Schult, HJ; Gorman, J	2005	Wild harvest of Cycas arnhemica (Cycadaceae): impact on survival, recruitment and growth in Arnhem Land, northern Australia	Austral. J. Bot. 53(8): 771-779		[Abstract]
Grilli Caiola, M	1990	Structural arrangement of phycobionts in coralloid roots of cycads.	Mem. New York Bot. Gard. 57: 94-99
Grobbelaar, N	1989	Disintegration of Encephalartos megastrobili.	S. African J. Bot. 55(6): 581-585
Grobbelaar, N	1993	Sencescence patterns in the female cones of Encephalartos	Proc. Second Int. Conf. Cycad Biol. : 159-161
Grobbelaar, N	1998	Encephalartos lanatus sex ratio	Encephalartos 53: 8
Grobbelaar, N	1999	Coning frequency, gender ratio and pollination of. Encephalartos transvenosus (Zamiaceae) at the Modjadje Nature Reserve, South Africa and the germination of thi	Biology and Conservarion of Cycads - Proceedings of the Fourth International Con : 309-318
Grobbelaar, N; Hattingh, W; Marshall, JK	1986	The occurrence of coralloid roots on the South African species of the Cycadales and their ability to fix nitrogen symbiotically.	S. African J. Bot. 52: 467-471
Grobbelaar, N; Marshall, JK	1993	Specificity of the cycad-cyanobiont symbiosis	Proc. Second Int. Conf. Cycad Biol. : 162-164
Grobbelaar, N; Scott, WE; Hattingh, W; Marshall, JK	1987	The identification of the coralloid root endophytes of the southern African cycads and the ability of the isolates to fix dinitrogen	S. African J. Bot. 53(2): 111-118
Grove, TS; O' Connell, AM; Malajczuk, N	1980	Effects of fire on the growth, nutrient content and rate of nitrogen fixation in the cycad Macrozamia riedlei	Austral. J. Bot. 28(3): 271-282		[Abstract]
Guan, ZT; Tao, GD	1995	A preliminary report of new cycad from Yunnan	Sichuan Forest. Surv. Design 1995(4): 1	Cycas diannanensis protologue
Gutierrez, KC	2018	What's in a latin name?: Cycas wadei & the politics of nomenclature	Philipp. J. Syst. Biol. 12: 24-35
Gutiérrez-García, K; Bustos-Díaz, ED; Corona-Gómez, JA; Ramos-Aboites, HE; Sélem	2018	The cycad coralloid root contains a diverse endophytic bacterial community with novel biosynthetic gene clusters unique to its microbiome	bioRxiv		[Abstract]
Gutiérrez-Ortega, JS; Jiménez-Cedillo, K; Pérez-Farrera, MA; Martínez, JF; Molin	2018	Species definition of Dioon sonorense (Zamiaceae), and description of D. vovidesii, a new cycad species from northwestern Mexico.	Phytotaxa 369(2): 107-114	Dioon vovidesii protologue
Gutiérrez-Ortega, JS; Jiménez-Cedillo, K; Pérez-Farrera, MA; Vovides, AP; Martín	2018	Considering evolutionary processes in cycad conservation: identification of evolutionarily significant units within Dioon sonorense (Zamiaceae) in northwestern M	Conservation Genetics 19(5): 1069		[Abstract]
Gutiérrez-Ortega, JS; Pérez-Farrera, MA; Chemnick, J; Gregory, TJ	2021	A reassessment of Dioon merolae (Zamiaceae) leads to the description of Dioon salas-moralesae (Zamiaceae), a new cycad species from southeastern Oaxaca, Mexico	Phytotaxa 528(2): 93-110	Dioon salas-moralesiae protologue
Gutiérrez-Ortega, JS; Pérez-Farrera, MA; Vovides, AP; Chávez-Cortázar, A; López,	2021	Ceratozamia sanchezae (Zamiaceae): A new cycad species from Chiapas Highlands (Mexico)	Phytotaxa 500(3): 201-216	Ceratozamia sancheziae protologue
Gutiérrez-Ortega, JS; Pérez-Farrera, MA; Vovides, AP; Salas-Morales, SH; Chemnic	2020	Dioon oaxacensis (Zamiaceae): a new cycad species from the arid central valleys of Oaxaca (Mexico)	Phytotaxa 474(1): 51-61	Dioon oaxacensis protologue
Gutiérrez-Ortega, JS; Salinas-Rodríguez, MM; Martínez, JF; Molina-Freaner, F; Pé	2018	The phylogeography of the cycad genus Dioon (Zamiaceae) clarifies its Cenozoic expansion and diversification in the Mexican transition zone	Ann. Bot. (Oxford) 121(3): 535-548		[Abstract]
Gutiérrez-Ortega, JS; Salinas-Rodriguez, MM; Martinez, JF; Molina-Freaner, F; Pé	2018	The phylogeography of the cycad genus Dioon (Zamiaceae) clarifies its Cenozoic expansion and diversification in the Mexican transition zone	Ann. Bot. (Oxford) 121(3): 535-548		[Abstract]
Gutiérrez-Ortega, JS; Watano, Y; Takahashi, Y; Murakami, M; Salinas-Rodríguez, M	2020	Niche conservatism promotes speciation in cycads: the case of Dioon merolae (Zamiaceae) in Mexico	New Phytol.
Hall, JA; Walter, GH	2013	Seed dispersal of the Australian cycad Macrozamia miquelii (Zamiaceae): are cycads megafauna-dispersed grove forming'' plant	Amer. J. Bot. 100(6): 1127-36		[Abstract]
Hall, JA; Walter, GH; Bergstrom, DM; Machin, PJ	2004	Pollination ecology of the Australian cycad Lepidozamia peroffskyana (Zamiaceae)	Austral. J. Bot. 52(3): 333-343		[Abstract]
Hall, WTK	1987	Cycad (Zamiaceae) poisoning in Australia	Australian Veterinary Journal 64(5): 149-151
Halliday, J; Pate, JS	1976	Symbiotic nitrogen fixation by coralloid roots of the cycad Macrozamia rielei: physiological characteristics and ecological significance.	Austral. J. Pl. Physiol. 3: 349-358
Hamilton, F	1826	Commentary on the Herbarium Amboinense	Mem. Wern. Nat. Hist. Soc. 5: 322-324	Cycas pectinata protologue
Handa, BK; Chexal, KK; Rahman, W; Okigawa, M; Kawano, N	1971	Occurrence of biflavones in Zamia	Phytochemistry 10(2): 436
Harris, TM	1941	Cones of extinct Cycadales from the Jurassic rocks of Yorkshire	?S3
Haynes, JL	2004	Lepidozamia peroffskyana in South Florida	Cycad Newslett. 27(1): 13
Haynes, JL	2004	Phenology of Bowenia in South Florida	Cycad Newslett. 27(4): 12
Haynes, JL	2004	Phenology of Encephalartos ferox in South Florida	Cycad Newslett. 27(3): 10
Haynes, JL	2004	Phenology of Zamia splendens in South Florida	Cycad Newslett. 27(2): 11
Haynes, JL	2006	Phenology of Ceratozamia kuesteriana in South Florida	Cycad Newslett. 29(2,3): 13
Haynes, JL	2007	A taxonomic and bibliographic history of Microcycas calocoma (Miq.) A.DC.	Cycad Newslett. 30(4): 18-19
Haynes, JL	2007	Overview of the cycad flora of Honduras	Mem. New York Bot. Gard. 97: 444-453
Haynes, JL	2008	Encephalartos horridus in South Florida	Cycad Newslett. 31(1): 9
Haynes, JL	2009	Taxonomic & Nomenclatural History of the Zamia skinneri complex	Cycad Newslett. 32(2,3): 7-8
Haynes, JL	2009	Taxonomic and Nomenclatural History, Etymology, Vernacular Names, Distribution and Conservation Status of Lepidozamia hopei (W. Hill) Regel	Cycad Newslett. 32(4): 10-11
Haynes, JL	2009	Taxonomic History, Conservation Status & Morphological Affinities of Encephalartos kisambo Faden & Beentje	Cycad Newslett. 32(1): 15-17
Haynes, JL	2010	Taxonomic history, morphologic and phylogenetic affinities, habitat and conservation status of Encephalartos sclavoi A. Moretti, D.W.Stev. & De Luca	Cycad Newslett. 33(2): 10-16
Haynes, JL	2011	Growing Encephalartos lehmanii in South Florida	Cycad Newslett. 34(4): 10
Haynes, JL	2011	Nomenclature, Taxonomy, Morphology, Phylogeny, Distribution, Habitat, and Conservation Status of Encephalartos lehmanii Lehm.	Cycad Newslett. 34(4): 8-9
Haynes, JL	2012	Popularity of Dioon spinulosum in South Florida	Cycad Newslett. 35(2): 14
Haynes, JL	2012	Strange But True - Dioon spinulosum Post-harvest Cone Elongation	Cycad Newslett. 35(2): 11
Haynes, JL	2012	Taxonomy, Morphology, Biogeography, Evolution, Life History, Conservation Status, Ethnobotany & Vernacular Names of Dioon spinulosum Dyer ex Eichler	Cycad Newslett. 35(2): 5-7
Haynes, JL	2014	Nomenclature, morphology, phylogeny, distribution, habitat, and conservation status of Encephalartos princeps R.A.Dyer	Cycad Newslett. 37(1): 3-4
Haynes, JL; Whitelock, LM; Schutzman, B; Adams, RS	2008	A new endemic Ceratozamia from Honduras (Cycadales: Zamiaceae)	Cycad Newslett. 31(2-3): 16-21	Ceratozamia hondurensis
Haynes, JL; Whitelock, LM; Schutzman, B; Adams, RS	2008	A new endemic Ceratozamia from Honduras (Cycadales: Zamiaceae)	Cycad Newslett. 31(2/3): 16-21	Ceratozamia hondurensis protologue
Henderson, MR	1945	Materials for a revision of the South African species of Encephalartos	J. S. African Bot. 11: 3-65
Hendricks, JG	1980	Germination of cycad seed	Cycad Newslett. 3(3): 3-8
Hennell, K	2010	Encephalartos sclavoi on Shogo mountain	Cycad Newslett. 33(2): 18
Hermsen, E; Taylor, E L; Stevenson, DW	2007	Cycads from the Triassic of Antarctica: Permineralized cycad leaves	International Journal of Plant Sciences 168(7): 1099-1112		[Abstract]
Hernández-Tapia, JE; Jiménez-Ramírez, J; Vovides, AP	2020	Taxonomic revision of the genus Dioon (Zamiaceae)	Phytotaxa 442(4): 267-290
Hill, KD	1992	A preliminary account of Cycas (Cycadaceae) in Queensland	Telopea 5(1): 177-206
Hill, KD	1993	Cycas arenicola (Cycadaceae), a new species from the Northern Territory of Australia	Telopea 5(2): 419-422
Hill, KD	1993	History of the taxonomy of Australian cycads	Proc. Second Int. Conf. Cycad Biol. : 250-259
Hill, KD	1994	The Cycas media group (Cycadaceae) in New Guinea	Austral. Syst. Bot. 7(6): 527-541
Hill, KD	1994	The Cycas rumphii complex (Cycadaceae) in New Guinea and the western Pacific	Austral. Syst. Bot. 7(6): 543-567
Hill, KD	1994	Three new species of Cycas (Cycadaceae) from the Northern Territory, Australia	Telopea 54(4): 693-701	Cycas arnhemica, C. orientis, C. canalis
Hill, KD	1995	Infrageneric relationships, phylogeny, and biogeography of the genus Cycas (Cycadaceae)	Proc. Third Int. Conf. Cycad Biol. : 139-162
Hill, KD	1995	The genus Cycas in the Indian region, with notes on the application and typification of the name Cycas circinalis	Taxon 44(1): 23-31
Hill, KD	1996	A taxonomic revision of the genus Cycas (Cycadaceae) in Australia	Telopea 7(1): 1-63
Hill, KD	1999	Cycas falcata (Cycadaceae), a new species from Sulawesi, Indonesia	Kew Bull. 54(1): 209-213		[Abstract]
Hill, KD	2004	An analysis of morphological characters used in classification of the Cycadaceae	Proc. Sixth Int. Conf. Cycad Biol. : 6-29
Hill, KD	2004	Cycas candida (Cycadaceae), a new species from Queensland together with an extension of range and amended description of Cycas yorkiana	Telopea 10(2): 607-611
Hill, KD	2008	The genus Cycas (Cycadaceae) in China	Telopea 12(1): 71-118
Hill, KD; Chase, MW; Stevenson, DW; Hills, HG; Schutzman, B	2003	The families and genera of cycads: a molecular phylogenetic analysis of Cycadophyta based on nuclear and plastid DNA sequences.	Int. J. Pl. Sci. 164(6): 933-948
Hill, KD; Jones, DL; Forster, PI	1998	Cycadophyta	Fl. Australia 48: 717	Macrozamia cardiacensis, M. concinna, M. elegans, M. glaucophylla, M. humilis, M. longispina, M. montana, M. polymorpha, M. reducta protologues
Hill, KD; Nguyên, TH; Lôc, PK	2004	The genus Cycas (Cycadaceae) in Vietnam	Bot. Rev. (Lancaster) 70(2): 134-193
Hill, KD; Stanberg, L	2009	Notes on Cycas truncata de Laub. and related matters	Telopea 12(3): 447-450
Hill, KD; Stevenson, DW; Osborne, R	2004	The World List of Cycads.	Bot. Rev. (Lancaster) 70(2): 274-298
Hill, KD; Stevenson, DW; Osborne, R	2007	The world list of cycads [La lista mundial de cícadas]	Mem. New York Bot. Gard. 97: 454-483
Hill, KD; Yang, SL	1999	The genus Cycas (Cycadaceae) in Thailand	Brittonia 51(1): 48-73
Hill, RS	1978	Two new species of Bowenia from the Eocene of eastern Australia.	Austral. J. Bot. 26(6): 837-846		[Abstract]
Hill, RS	1980	Three new Eocene cycads from eastern Australia	Austral. J. Bot. 28(1): 105-122		[Abstract]
Hill, RS; Hill, KE; Carpenter, RJ; Jordan, GJ	2019	New Macrofossils of the Australian Cycad Bowenia and Their Significance in Reconstructing the Past Morphological Range of the Genus	International Journal of Plant Sciences 180(2): 128-140		[Abstract]
Hill, W	1865	New Plants [Catakidozamia hopei]	Gard. Chron. 1865: 1107
Hill, W	2001	Cycads of Australia	Not given
Hill, W; Osborne, R	2004	The world list of cycads	Bot. Rev. (Lancaster) 70(2): 274-298		[Abstract]
Hoese, G	2012	Sinkhole and karst habitat of Ceratozamia latifolia and related Mexican cycads	Mem. New York Bot. Gard. 106: 82-92
Hoese, G	2012	Sinkhole and karst habitat of Ceratozamia latifolia and related Mexican cycads	Mem. New York Bot. Gard. 106: 82-92
Hoffmann, GR	1993	Mutagens produced by cycads	Proc. Second Int. Conf. Cycad Biol. : 24-28
Holton, D	2009	Growing the Zamia skinneri Complex in South Florida	Cycad Newslett. 32(2,3): 10
Holzman, G	2006	Cycas debaoensis cultivation in Hawaii	Cycad Newslett. 29(1): 12
Holzman, G	2007	Encephalartos turneri in Hawaii	Cycad Newslett. 30(2): 14
Holzman, G	2008	Encephalartos horridus in Hawaii	Cycad Newslett. 31(1): 7-8
Holzman, G	2009	Growing Kisambos in Hawaii	Cycad Newslett. 32(1): 19-20
Holzman, G	2009	Growing the Zamia skinneri Complex in Hawaii	Cycad Newslett. 32(2,3): 11-12
Holzman, G	2010	Growing Zamia lindenii in Hawaii	Cycad Newslett. 33(4): 11
Holzman, G	2010	Hawaii's Stangeria in cultivation	Cycad Newslett. 33(1): 14
Hooker, JD	1872	Macrozamia corallipes. Native of New South Wales	Bot. Mag. 98: 5943
Hooker, WJ	1863	Encephalartos horridus; var. trispinosa. Three-toothed Encephalartos	Bot. Mag. 89: 5371
Hooker, WJ	1863	Tab. 5398. Bowenia spectabilis. Australian Bowenia	Bot. Mag. 89: 5398
Howard, F; McLaughlin, M; Weissling, T; Yang, SL	1999	Aulacaspis yasumatsui (Hemiptera : Sternorrhyncha : Diaspididae), a scale insect pest of cycads recently introduced into Florida	Florida Entomologist 82(1): 14-27		[Abstract]
Howard, FW	1989	Insecticidal control of magnolia white scale and long-tailed mealybug on sago-palms.	Proc. Florida State Hort. Soc. 102: 293-295
Howard, FW; Weissling, TJ	1999	Questions and answers about the cycad Aulacaspis scale insect.	Proc. Florida State Hort. Soc. 112: 243-245
Hsieh, E; Haynes, JL	2007	King sago (Cycas revoluta) production in Taiwan, with comments on cycad aulacaspis scale and the endemic C. taitungensis	Cycad Newslett. 30(3): 11-13
Hu, YM, J; Hu, B	2000	The geographical distribution of Cycad plants in the geological periods in China	Memoirs Beijing Natural History Museum		[Abstract]
Huang, S; Hsieh, HT; Fang, K; Chiang, YC	2004	Patterns of genetic variation and demography of Cycas taitungensis in Taiwan.	Bot. Rev. (Lancaster) 70(1): 86-92
Huang, TC; Grobbelaar, N	1989	Isolation and characterization of endosymbiotic Calothrix (Cyanophyceae) in Encephalartos hildebrandtii (Cycadales).	Phycologia 28(4): 464-468
Huang, YL; Zhong, X; Wei, L; Zhang, H; Lu, Yuanfeng	2010	Structural Characteristics of Vessels in Three Families of Cycadopsida	Journal of Life Sciences 4(7): 1-15
Huang, YY	2018	Studies of the conservation process and taxonomy of Cycas baiseensis and Cycas debaoensis	Mem. New York Bot. Gard. 117: 504-518	Cycas baiseensis protologue
Huang, YY; Zhong, YC; Lu, ZF	2008	Cycas gracilis Y. Y. Huang Y. C. Zhong et Z. F. Lu, a new species of Cycas from Guangxi	J. Pl. Genet. Resources 9(4): 525-527
Hubbuch, C	1987	Cycads: propagation and container culture	Fairchild Trop. Gard. Bull. 42(3): 5-8
Hubbuch, C	1991	Wings of a dilemma: the atala butterfly	Fairchild Trop. Gard. Bull. 46(3): 20-23
Hurter, PJH	1994	Focus on Encephalartos heenanii	Encephalartos 40: 4-7
Hurter, PJH	1994	Focus on Encephalartos kisambo	Encephalartos 39: 4-8
Hurter, PJH	1995	Two newly described cycads from Africa	Phytologia 78: 409-416	Encephalartos nubimontanus & E. whitelockii
Hurter, PJH; Claassen, I	1996	Focus on Encephalartos nubimontanus	Encephalartos 45: 4-11
Hurter, PJH; Claassen, I	1996	Focus on Encephalartos whitelockii	Encephalartos 48: 4-9
Hurter, PJH; Glen, H	1995	Encephalartos equatorialis (Zamiaceae): a newly described species from tropical Africa	S. African J. Bot. 61(4): 226-229
Hurter, PJH; Glen, H	1996	Encephalartos hirsutus (Zarniaceae): a newly described species from South Africa	S. African J. Bot. 62(1): 46-48
Hurter, PJH; Glen, H	2001	Encephalartos relictus: a new species from Southern Africa	Bothalia 31(2): 197-199
Hurter, PJH; Glen, H; Claassen, I	1997	Focus on Encephalartos hirsutus	Encephalartos 52: 4-7
Hurter, PJH; Whitelock, LM	1998	Focus on Encephalartos schmitzii	Encephalartos 55: 4-8
Hutchinson, J; Rattray, G	1933	Cycadaceae	Fl. Cap. (Harvey) 5(2): 24-44
Ironmonger, B; Ironmonger, S	2003	The Macrozamia heteromera gourp: taxonomy, distribution, and cultivation	Cycad Newslett. 26(3): 12-14
Ironmonger, B; Ironmonger, S	2004	Lepidozamia peroffskyana	Cycad Newslett. 27(1): 12
Ironmonger, B; Ironmonger, S	2004	The butcher's fern - the genus Bowenia	Cycad Newslett. 27(4): 10-11
Ironmonger, B; Ironmonger, S	2006	Macrozamia moorei: in habitat and cultivation	Cycad Newslett. 29(2,3): 14-17
Ironmonger, S	2003	Growing Cycas panzhihuaensis in Southern California	Cycad Newslett. 26(4): 14
Ito-Inaba, Y; Sato, M; Sato, MP; Kurayama, Y; Yamamoto, H; Ohata, M; Ogura, Y; H	2019	Alternative Oxidase Capacity of Mitochondria in Microsporophylls May Function in Cycad Thermogenesis	Plant Physiology (2): 743
Jacquin, N	1789	Observationes botanicae	Collectanea [Jacquin] 3: 167-276
Jacquin, N	1792	Zamia angustifolia	Icon. Pl. Rar. [Jacquin] 3: 20
Jacquin, N	1798	Zamia media	Pl. Rar. Hort. Schoenbr. 3: 77
Jacquin, N	1805	Zamia cycadifolia	Fragm. Bot. 27
Jacquin, N	1805	Zamia horrida	Fragm. Bot. 27
Jacquin, N	1805	Zamia lanuginosa	Fragm. Bot. 28
Jacquin, N	1805	Zamia longifolia	Fragm. Bot. 28
Jayaprakasam, B; Damu, AG; Gunasekar, D; Blond, A; Bodo, B	2000	A biflavanone from Cycas beddomei	Phytochemistry 53(4): 515-517		[Abstract]
Jeyasingh, D	1995	Aphanocapsa Nageli in symbiosis with Cycas beddomei Dyer	Phytomorphology 45(3-4): 247-251		[Abstract]
Jibankumar, K; Singh, R	2012	The ethnobotany of Cycas in the states of Assam and Meghalaya, India	Mem. New York Bot. Gard. 106: 151-164
Johnson, LA	1959	The families of cycads and the Zamiaceae of Australia	Proc. Linn. Soc. New South Wales, ser. 2, 84(1): 64-117
Johnson, LA	1961	Zamiaceae	Contr. New South Wales Natl. Herb., Fl. Ser. 1: 21-41
Johnson, MA	1939	Structure of the shoot apex in Zamia.	Bot. Gaz. 101: 189-203
Johnson, MA	1939	Fascicled roots of Cycas revoluta	Bot. Gaz. 101: 189-203
Johnson, MA	1943	Foliar development in Zamia	Amer. J. Bot. 30: 366-378
Johnson, MA	1944	Zonal structure of the shoot apex in Encephalartos, Bowenia and Macrozamia	Bot. Gaz. 106: 26-33
Johnson, MA	1945	On the shoot apex of the cycads	Torreya 44(3): 52-58
Jones, DL	1991	Notes on Macrozamia Miq. (Zamiaceae) in Queensland with the description of two new species in section Parazamia (Miq.) Miq.	Austrobaileya 3(3): 481-487	Macrozamia fearnsidei & M. lomandroides
Jones, DL	2002	Cycads of the World: ancient plants in today's landscape	Not given
Jones, DL; Forster, PI	1994	Seven new species of Macrozamia section Parazamia (Miq.) Miq. (Zamiaceae section Parazamia) from Queensland	Austrobaileya 4(2): 268-288	Macrozamia conferta, M. cranei, M. crassifolia, M. machinii, M. occidua, M. parcifolia & M. viridis
Jones, DL; Forster, PI; Sharma, IK	2001	Revision of the Macrozamia miquelii (F.Muell.) A.DC. (Zamiaceae section Macrozamia) group	Austrobaileya 6(1): 67-94
Jones, DL; Hill, KD	1992	Macrozamia johnsonii, a new species of Macrozamia section Macrozamia (Zamiaceae) from northern New South Wales	Telopea 5(1): 31-34
Jones, K	1998	Robertsonian fusion and centric fission in karotype evolution of higher plants	Bot. Rev. (Lancaster) 64(3): 273-289
Jones, S; Wynants, J	1997	Encephalartos macrostrobilus (Zamiaceae), a new cycad species from Northern Uganda	Encephalartos 50: 13-17
Joubert, L; Grobbelaar, N; Coetzee, J	1989	In-situ studies of the ultrastructure of the cyanobacteria in the coralloid roots of Encephalartos arenarius, Encephalartos transvenosus and Encephalartos woodii (Cycadales).	Phycologia 28(2): 197-205
Jutta, K.L.Chew & Saw	2010	A new species of Cycas (Cycadaceae) from Peninsular Malaysia	Blumea 55(3): 249-252	Cycas cantafolia	[Abstract]
Jutta, M; Chew, KL; Saw, LG	2010	A new species of Cycas (Cycadaceae) from Peninsular Malaysia	Blumea 55(3): 249-252		[Abstract]
Kanle Satishchandra, N; Geerts, S	2020	Modeling the Distribution of the Invasive Alien Cycad Aulacaspis Scale in Africa Under Current and Future Climate Scenarios	Journal of economic entomology		[Abstract]
Kay, J; Strader, A; Murphy, V; Nghiem-Phu, L; Calonje, M; Griffith, MP	2011	Palma Corcho: A Case Study in Botanic Garden Conservation Horticulture and Economics	HortTechnology 21(4): 478-481	Microcycas calocoma
Kemp, M	1985	Focus on Encephalartos caffer	Encephalartos 3: 6-11
Kemp, M	1985	Focus on Encephalartos lehmannii	Encephalartos 4: 12-17
Kemp, M	1985	Focus on Encephalartos longifolius	Encephalartos 1: 6-13
Kemp, M	1986	Focus on Encephalartos horridus	Encephalartos 7: 8-13
Kemp, M	1986	Focus on Encephalartos latifrons	Encephalartos 8: 8-15
Kemp, M	1987	Focus on Encephalartos arenarius	Encephalartos 11: 4-7
Kemp, M	1989	Focus on Encephalartos friderici-guilielmi	Encephalartos 18: 4-9
Kemp, M	1990	Focus on Encephalartos princeps	Encephalartos 24: 3-7
Kemp, M	1991	Focus on Encephalartos cycadifolius	Encephalartos 26: 3-7
Kennedy, P; Thompson, G; Osborne, R	2001	Focus on Macrozamia communis	Encephalartos 68: 13-22
Keppel, G	2002	Low genetic variation in a Pacific cycad: conservation concerns for Cycas seemannii (Cycadaceae)	Oryx 36(1): 41-49		[Abstract]
Keppel, G	2004	Focus on Cycas seemannii	Encephalartos 78: 12-20
Keppel, G; Hodgskiss, PD; Plunkett, GM	2008	ORIGINAL ARTICLE: Cycads in the insular South-west Pacific: dispersal or vicariance?	J. Biogeogr. 35(6): 1004-1015		[Abstract]
Keppel, GL, S W; Hodgskiss, PD	2002	Evidence for long isolation among populations of a Pacific cycad: Genetic diversity and differentiation in Cycas seemannii A.Br. (Cycadaceae)	J. Heredity 93(2): 133-139		[Abstract]
Kershaw, EM	1912	Structure and development of the ovule of Bowenia spectabilis	Ann. Bot. (Oxford) 26(3): 625-646
Khuraijam, JS; Singh, R	2020	Taxonomic status of the Cycas pectinata complex	Cycads 5(1): 59-76
Khuraijam, JS; Singh, R; Calonje, M; Mazumdar, J	2018	(2653) Proposal to conserve the name Cycas pectinata (Cycadaceae) with a conserved type	Taxon 67(6): 1213-1213
Khuraijam, JS; Singh, R; Calonje, M; Mazumdar, J	2018	Lectotypification of Cycas beddomei (Cycadaceae)	Phytotaxa 383(1): 4		[Abstract]
Kim, K; Whang, SS; Sun, BY	1995	Cuticle Micromorphology of Korean Gymnosperms: I Cycadaceae, Ginkgoaceae, Taxaceae and Cephalotaxaceae	J. Plant Biology 38(2): 181-193		[Abstract]
Kipp, MA; Stueken, EE; Gehringer, MM; Sterelny, K; Scott, JK; Forster, PI; Strom	2020	Exploring cycad foliage as an archive of the isotopic composition of atmospheric nitrogen	Geobiology (2): 152		[Abstract]
Klavins, SD; Krings, M; Taylor, E L; Taylor, T N	2005	Coprolites in a Middle Triassic cycad pollen cone: evidence for insect pollination in early cycads?	Evolutionary Ecology Research 7(3): 479-488		[Abstract]
Klavins, SD; Taylor, EL; Krings, M; Taylor, TN	2003	Gymnosperms from the Middle Triassic of Antarctica: the first structurally preserved cycad pollen cone	Int. J. Pl. Sci. 164(6): 1007-1020
Koeleman, A; Small, JGC	1982	A note on callus formation by stem and root tissue of some Encephalartos species	S. African J. Bot. 1(4): 165-166
Kokubugata, G; Hill, KD; Kondo, K	2002	Ribosomal DNA distribution in somatic chromosomes of Stangeria eriopus (Stangeriaceae, Cycadales) and molecular-cytotaxonomic relationships to some other cycad genera.	Brittonia 54(1): 1-5
Kokubugata, G; Kondo, K	1996	Differential fluorescent-banding patterns in chromosomes of 4 species of Cycas (Cycadaceae).	Bot. J. Linn. Soc. 120(1): 51-55
Kokubugata, G; Vovides, AP; Kondo, K	2004	Mapping 5S ribosomal DNA on somatic chromosomes of four species of Ceratozamia and Stangeria eriopus (Cycadales)	Bot. J. Linn. Soc. 145(4): 499-504
Kokubugata, GK, K	1998	Comparative karyotype analysis of Ceratozamia mexicana and Microcycas calocoma (Zamiaceae) using fluorochrome banding (CMA/DAPI) and fluorescence in situ hybridi	Pl. Syst. Evol. 210(1-2): 41-50		[Abstract]
Kokubugata, GK, K; Wilson, G W; Randall, L M; Schans, A van der; Morris, D K	2000	Comparison of karyotype and rDNA-distribution in somatic chromosomes of Bowenia species (Stangeriaceae, Cycadales)	Austral. Syst. Bot. 13(1): 15-20		[Abstract]
Konijnenburg, V	1968	Androstrobus major, a new male Cycad cone from the Jurassic of Yorkshire (England)	Review Palaeobotany & Palynology 7(4): 267-273
Kono, M; Tobe, H	2007	Is Cycas revoluta (Cycadaceae) wind- or insect-pollinated?	Amer. J. Bot. 94: 847-855
Kozik, AR, K M	1996	Comparative study on binding of thiamine related compounds by extracts of seeds of Zea mays, Spinacia oleracea, Picea abies and Cycas revoluta	Plant Physiology & Biochemistry Paris 34(6): 779-786		[Abstract]
Krieg, C; Watkins, JE; Chambers, S; Husby, CE	2017	Sex-specific differences in functional traits and resource acquisition in five cycad species	AoB Plants 9(2): 13		[Abstract]
Kunze, G	1839	Additamentum enumerationis filicum mexicanarum, partim a B. Schiedeo, partim a cl. car. Ehrenbergio aliisque collectarum	Linnaea 13: 129-153
Kurland, LT	1993	Cycas circinalis as an etiologic risk factor in Amyotrophic Lateral Sclerosis andother neurodegenerative diseases on Guam	Proc. Second Int. Conf. Cycad Biol. : 29-36
Kvacek, J	1995	Cycadales and Bennettitales leaf compressions of the Bohemian Cenomanian, Central Europe	Review Palaeobotany & Palynology 84(3-4): 389-412		[Abstract]
Kvacek, Z	2002	A new tertiary Ceratozamia (Zamiaceae, Cycadopsida) from the European oligocene	Flora 197(4): 303-316		[Abstract]
Kvacek, Z	2004	A noteworthy cycad, Ceratozamia hofmannii ETTINGSHAUSEN 1887, from the Lower Miocene of Austria re-examined	Neues Jahrbuch Fur Geologie Und Palaontologie-Monatshefte (2): 111-118		[Abstract]
Kvacek, Z; Manchester, SR	1999	Eostangeria barthel (extinct Cyadales) from the paleogene of western North America ane Europe.	Int. J. Pl. Sci. 160(3): 621-629
Kyoda, S; Setoguchi, H	2010	Phylogeography of Cycas revoluta Thunb. (Cycadaceae) on the Ryukyu Islands: very low genetic diversity and geographical structure	Pl. Syst. Evol. 288(3-4): 177-189		[Abstract]
Ladd, PG; Connell, SW; Harrison, B	1993	Seed toxicity in Marozamia riedlei	Proc. Second Int. Conf. Cycad Biol. : 37-41
Lamb, MA Sister	1923	Leaflets of Cycadaceae	Bot. Gaz. 76: 185-202
Lamont, BB; Ryan, RA	1977	Formation of coralloid roots by cycads under sterile conditions	Phytomorphology 27(4): 426-429
Lan, K-M; Zou, R-F	1983	A new species of Cycas Linn from Guizhou Province.	Acta Phytotax. Sin. 21(2): 209-210	Cycas guizhouensis protologue
Landry, GP	2003	How the scientific description of C. hildae came about	Cycad Newslett. 26(2): 12
Landry, GP; Wilson, MC	1979	A new species of Ceratozamia (Cycadaceae) from San Luis Potosí	Brittonia 31(3): 422-424	Ceratozamia hildae
Lang, WH	1897	Studies in the development and morphology of cycadean sporangia. I. The microsporangia of Stangeria paradoxa.	Ann. Bot. (Oxford) 11(3): 421-438
Lang, WH	1900	Studies in the development and morphology of cycadean sporangia: II. the ovule of Stangeria paradoxa.	Ann. Bot. (Oxford) 14(2): 281-306
Langdon, LM	1920	Stem anatomy of Dioon spinulosum	Bot. Gaz. 70: 110-125
LaRue, CD	1948	Regeneration in the megagametophyte of Zamia floridana	Bull. Torrey Bot. Club 75(6): 597-603
LaRue, CD	1950	Regeneration in Cycas	Amer. J. Bot. 37: 664
Laubenfels, DJ de	1996	C. javana (Miquel) de Laubenfels, comb. nov.	Cycads China : 65-68	Cycas javana protologue
Laubenfels, DJ de	1999	The families of the Cycadaceae	Encephalartos 59: 7-9
Lauterbach, K	1900	Cycadaceae	Fl. Schutzgeb. Südsee : 153-155	Cycas schumanniana protologue
Lavranos, JJ; Goode, D	1985	Encephalartos turneri (Cycadaceae), a new species from Mozambique	Garcia de Orta, Ser. Bot. 7(1-2): 11-14	Encephalartos turneri protologue
Lavranos, JJ; Goode, DL	1988	Notes on Southern African Cycadales	Bull. Jard. Bot. Natl. Belg. 58(1-2): 219-224
Lazcano Lara, J	2007	Ex situ conservation of Microcycas calocoma, Zamia amblyphyllidia, Z. integrifolia, Z. ottonis, and Z. pygmaea germplasm at the National Botanic Garden, Cuba	Mem. New York Bot. Gard. 97: 32-44
Lazcano Lara, J	2007	Notes on Microcycas calocoma	Cycad Newslett. 30(4): 15-17
Leandri, J	1931	Cycadaceae	Flore Genenile de l'Indochine 5(10): 1085-1092	Cycas chevalieri protologue
Leary, RL	1990	Possible early Pennsylvanian ancestor of the Cycadales.	Science 249: 1152-1154
Ledile, TM; Kowiyou, Y; Thendo, M; Munyaradzi, C	2020	The Cycad Genus Cycas May Have Diversified From Indochina and Occupied Its Current Ranges Through Vicariance and Dispersal Events	Frontiers in Ecology and Evolution 8		[Abstract]
Lehmann, JG	1834	De plantis cycadeis, praesertim Africae Australis	Nov. Stirp. Pug. 6: 1-14
Leitch, IJ; Hanson, L; Winfield, M; Parker, J; Bennett, MD	2001	Nuclear DNA C-values complete familial representation in Gymnosperms	Ann. Bot. (Oxford), n.s. 88(5): 843-849
Lemaire, C	1867	Encephalartos ghellinckii	L'Illustration Horticole. Ghent & Brussels 14: 79-80	Encephalartos ghellinckii protologue
Lemaire, C	1867	Encephalartos villosus	L'Illustration Horticole. Ghent & Brussels 14: 80-81	Encephalartos villosus protologue
Lemaire, CA	1867	Deux especes nouvelles d'Encephalartus (Cycadaceae)	Ill. Hort. 14: 79-81
Leppe, MM	2003	New records of Upper Triassic Cycadales and Cycadeoidales of Biobio river, Chile	Revista Chilena De Historia Natural 76(3): 475-484		[Abstract]
Levine, M	2005	Encephalartos laurentianus - the Kwango giant cycad	Cycad Newslett. 28(3-4): 26-27
Levine, M	2007	Encephalartos turneri - Turner's cycad	Cycad Newslett. 30(2): 11-12
Levine, M; Loewenstein, L	2008	Encephalartos horridus, the Eastern Cape blue cycad	Cycad Newslett. 31(1): 4-7
Li, C-J; Brownson, DM; Mabry, TJ; Perera, C; Bell, EA	1996	Nonprotein amino acids from seeds of Cycas circinalis and Phaseolus vulgaris	Phytochemistry 42(2): 443-445
Li, L; Wang, Z-F; Jian, SG; Zhu, P; Zhang, M; Ye, W-H; Ren, H	2008	Isolation and characterization of microsatellite loci in endangered Cycas changjiangensis (Cycadaceae)	Conservation Genetics 10(3): 793-795		[Abstract]
Life, AC	1901	The tuber-like rootlets of Cycas revoluta	Bot. Gaz. 31: 265-271
Light, KE	1924	The ovule and the development of the female gametophyte of Macrozamia fraseri	Ann. Bot. (Oxford) 38(2): 337-349
Lindblad, P	1990	Nitrogen and carbon metabolism in coralloid roots of cycads	Mem. New York Bot. Gard. 57: 104-113
Lindblad, P; Bergman, B	1987	The Cycas revoluta Nostoc symbiosis: enzyme activities of nitrogen and carbon metabolism in the cyanobiont	The J. General Microbiology : 1695-1699
Lindblad, P; Bergman, B; Hofsten, AV; Hallbom, L; Nylund, JE	1985	The cyanobacterium and Zamia skinneri symbiosis: an ultrastructural study	New Phytol. 101(4): 707-716
Lindblad, P; Haselkorn, R; Bergman, B; Nierzwicki-Bauer, SA	1989	Comparison of DNA restriction fragment length polymorphisms of Nostoc strains in and from cycads	Arch. Microbiol. 152(1): 20-4		[Abstract]
Lindblad, P; Hofsten, AV; Hallbom, L; Nylund, JE	1985	THE CYANOBACTERIUM ZAMIA SYMBIOSIS - AN ULTRASTRUCTURAL-STUDY	New Phytol. 101(4): 707-716
Linden, J	1873	Zamia roezlii	Cat. General 90: 10	Zamia roezlii protologue
Linden, JJ	1897	Neue und emfehlenswerte Pflanzen etc.	Gartenflora 46: 357-359
Lindley, J	1843	Dion edule	Edwards's Bot. Reg. 29: 59-60
Lindström, AJ	2009	Typification of some species names in Zamia L. (Zamiaceae), with an assessment of the status of Chigua D. Stev.	Taxon 58(1): 265-270
Lindström, AJ	2010	Taxonomy, nomenclature, biogeography, morphology, ethnobotany, and conservation status of Zamia lindenii Regel ex André	Cycad Newslett. 33(4): 8-11
Lindström, AJ	2012	International Union for Conservation of Nature (IUCN)/Species Survival Commission (SSC) Cycad Specialist Group Ex Situ Conservation and Recovery Programme (CSG- ECRP)	Mem. New York Bot. Gard. 106: 9-19
Lindström, AJ; Calonje, M; Stevenson, DW; Husby, C; Taylor, A	2013	Clarification of Zamia acuminata and a new Zamia species from Coclé Province, Panama	Phytotaxa 98(2): 27-42	Zamia nana protologue
Lindström, AJ; Hill, KD	2002	Notes on the species of Cycas (Cycadaceae) from Sri Lanka and islands of the Andaman Sea	Novon 12(2): 237-240
Lindström, AJ; Hill, KD	2003	New species and a new record of Cycas (Cycadaceae) from Thailand	Brittonia 54(4): 298-304	Protologue descriptions(s): Cycas petraea and C. elephantipes
Lindström, AJ; Hill, KD	2007	The genus Cycas (Cycadaceae) in India	Telopea 11(4): 463-488
Lindström, AJ; Hill, KD; Stanberg, L	2008	The genus Cycas (Cycadaceae) in The Philippines	Telopea 12(1): 119-145
Lindström, AJ; Hill, KD; Stanberg, L	2009	The genus Cycas (Cycadaceae) in Indonesia	Telopea 12(3): 385-418
Lindström, AJ; Idárraga-Piedrahita, A	2009	Zamia incognita (Zamiaceae): the exciting discovery of a new gymnosperm from Colombia	Phytotaxa 2: 29-34
Linnaeus, C	1753	Palmae Pennatifoliae. Cycas	Sp. Pl. 2 : 1188	Cycas circinalis protologue
Linnaeus, C	1763	Palmae pennatifoliae	Sp. Pl. 2 2: 1658-1659
Linnaeus, C	1789	Palmae Pennatifoliae. Zamia.	Hort. Kew. (W. Aiton) 3: 477-479	Zamia furfuracea and Z. integrifolia protologues
Litz, RE; Chavez, VM	1995	Somatic embryogenesis of leaf callus derived from mature trees of the Cycad Ceratozamia hildae (Gymnospermae)	Plant Cell Tissue and Organ Culture : 25-31		[Abstract]
Litz, RE; Moon, PA; Benson, EM; Stewart, J; Chavez, VM	2004	A biotechnology strategy for long term preservation of cycads.	Bot. Rev. (Lancaster) 70(1): 39-46
Liu, G-f; Deng, T-x; Lin, Z; Yang, SY	1993	The root nodules and nitrogen fixation in Cycas panzhihuaensis	Proc. Second Int. Conf. Cycad Biol. : 165-168
Liu, J; Gong, X; Lindström, AJ	2019	Characterization of the complete chloroplast genome of Microcycas calocoma (Zamiaceae), an Endangered monotypic cycad species from Cuba	Mitochondrial DNA Part B: Resources 4(2): 3695-3697
Liu, J; Zhou, W; Gong, X	2015	Species delimitation, genetic diversity and population historical dynamics of Cycas diannanensis (Cycadaceae) occurring sympatrically in the Red River region of China	Front. Plant Sci. 6(696): 1-15
Liu, N	1998	A new species of the genus Cycas from Hainan Island, China	Acta Phytotax. Sin. 36(6): 552-554	Cycas changjiangensis protologue
Liu, N	2007	Distribution and type locality of Cycas taiwaniana	Acta Phytotax. Sin. 45(2): 246-250		[Abstract]
Liu, N; Qin, G	2004	Notes on some species of Cycas (Cycadaceae) from China	Proc. Sixth Int. Conf. Cycad Biol. : 1-4	New combination(s): Cycas szechuanensis subsp. fairylakea, C. hainanensis subsp. changjiangensis
Loconte, H	1993	The interpretation of the stem lineage of the Cycadales	Proc. Second Int. Conf. Cycad Biol. : 260-262
Loewenstein, L	2008	Thorny thoughts from a cycad novice	Cycad Newslett. 31(1): 10
López-Gallego, C; López-Alvarez, N	2007	A rescue, propagation and reintroduction program for one of the most endangered cycad genera: Chigua in northwestern Colombia	Cycad Newslett. 30(4): 34-35
Loureiro, J de	1790	Flora Cochinchinensis, 2nd ed	Fl. Cochinch. 2: 632	Cycas inermis protologue
Lucas-González, JL; Flores-Vázquez, JC	2012	Seed germination of Dioon merolae, a cycad of Oaxaca, México, under different irrigation treatments	Mem. New York Bot. Gard. 106: 93-101
Lundell, CL	1939	Studies of Mexican and Central American Plants VII (Ceratozamia matudai sp. nov.)	Lloydia 2(2): 75-76
Ma, Y; Wang, B; Zhou, GM; Yu, S Q; Peng, S L; Hao, YQ; Wei, XH; Liu, J; Yu, Z X	2009	CARBON STORAGE OF CYCAD AND OTHER GYMNOSPERM ECOSYSTEMS IN CHINA: IMPLICATIONS TO EVOLUTIONARY TRENDS	Polish Journal of Ecology 57(4): 635-646		[Abstract]
Maconochie, JR	1978	Two new species of Cycas from Northern Australia	J. Adelaide Bot. Gard. 1(3): 175-178	Cycas calcicola & Cycas pruinosa
Madulid, DA; Agoo, EM	2005	A New Species of Cycas (Cycadaceae) from the Philippines	Blumea 50(3): 519-522	Cycas zambalensis	[Abstract]
Malaisse, F	1969	Encephalartos schmitzii Malaisse, Cycadacée nouvelle du Congo-Kinshasa	Bull. Jard. Bot. Natl. Belg. 39(4): 401-406
Malaisse, F; Sclavo, JP; Crosiers, C	1992	Recherches sur les Encephalartos (Zamiaceae) dAfrique centrale	Ann. Gembloux 98(2): 153-157	Encephalartos delucanus protologue
Malaisse, F; Sclavo, JP; Crosiers, C	1993	Recherches sur les Encephalartos Lehm. (Zamiaceae) d'Afrique centrale 2. Apport de la morphologie foliaire dans la différenciation spécifique	Bull. Jard. Bot. Natl. Belg. 62: 205-219
Malaisse, F; Sclavo, JP; Turner, I	1990	Zamiaceae, a new family for Zambia	Mem. New York Bot. Gard. 57: 162-168	Encephalartos schmitzii range extension
Maldonado-Ruiz, MF; Flores-Vázquez, JC	2012	Entomofauna asociada a Dioon sp. nov. y actividad de los insectos polinizadores en San Jerónimo Taviche, Oaxaca, México	Mem. New York Bot. Gard. 106: 295-301
Mamay, SH	1969	Cycads: fossil evidence of late Paleozoic origin	Science 164
Mamay, SH	1973	Archaeocycas and Phasmatocycas; new genera of Permian Cycads	J. Research US Geological Survey 1(6): 687-689
Marler, PN; Marler, TE	2015	An Assessment of Red List Data for the Cycadales	Tropical Conservation Science 8(4): 1114-1125		[Abstract]
Marler, TE	1997	Leaf gas-exchange characteristics of sixteen cycad species	Journal of the American Society for Horticultural Science 122(1): 38-42		[Abstract]
Marler, TE	2004	Leaf physiology of shade-grown Cycas micronesica leaves following removal of shade	Bot. Rev. (Lancaster) 70(1): 63-71		[Abstract]
Marler, TE	2004	Leaf physiology of shade-grown Cycas micronesica leaves following removal of shade.	Bot. Rev. (Lancaster) 70(1): 63-71
Marler, TE	2007	Age influences photosynthetic capacity of Cycas micronesica leaves	Mem. New York Bot. Gard. 97: 194-203
Marler, TE	2010	Cycad mutualist offers more than pollen transport	Amer. J. Bot. 97(5): 841-5		[Abstract]
Marler, TE	2012	Cycad aulacaspis scale invades the Mariana Islands	Mem. New York Bot. Gard. 106: 20-35
Marler, TE	2012	Cycad Aulacaspis scale invades the Mariana Islands	Mem. New York Bot. Gard. 106: 20-35
Marler, TE; Calonje, M	2020	Two cycad species affect the carbon, nitrogen, and phosphorus content of soils	Horticulturae 6(2)
Marler, TE; Cascasan, ANJ	2018	Carbohydrate Depletion during Lethal Infestation ofAulacaspis yasumatsui on Cycas revoluta	International Journal of Plant Sciences 179(6): 497-504		[Abstract]
Marler, TE; Cruz, GN	2019	Source and Sink Relations Mediate Depletion of Intrinsic Cycad Seed Carbohydrates by Aulacaspis yasumatsui Infestation	Not given 54: 1712-1717
Marler, TE; Dongol, N	2016	Three invasive insects alter Cycas micronesica leaf chemistry and predict changes in biogeochemical cycling	Commun Integr Biol 9(5)		[Abstract]
Marler, TE; Hirsch, H	1998	Guams Cycas micronesica populations ravaged by supertyphoon Paka	HortScience 33(7): 1116-1119
Marler, TE; Lawrence, JH	2012	Demography of Cycas micronesica on Guam following introduction of the armoured scale Aulacaspis yasumatsui	Journal of Tropical Ecology 28(3): 233-242		[Abstract]
Marler, TE; Lee, V; Chung, J; Shaw, CA	2006	Steryl glucoside concentration declines with Cycas micronesica seed age	Funct Plant Biol 33(9): 857-862		[Abstract]
Marler, TE; Lee, V; Shaw, CA	2005	Cycad toxins and neurological diseases in Guam: defining theoretical and experimental standards for correlating human disease with environmental toxins	HortScience 40(6): 1598-1606
Marler, TE; Lee, V; Shaw, CA	2005	Spatial variation of steryl glucosides in Cycas micronesica plants: Within- and among-plant sampling procedures	HortScience 40(6): 1607-1611
Marler, TE; Lee, V; Shaw, CA	2007	Storage does not influence steryl glucoside concentration in Cycas micronesica seeds	HortScience 42(3): 626-628
Marler, TE; Moore, A	2010	Cryptic Scale Infestations on Cycas revoluta Facilitate Scale Invasions	HortScience 45(5): 837-839		[Abstract]
Marler, TE; Shaw, CA	2010	Distribution of free and glycosylated sterols within Cycas micronesica plants	Sci Hortic (Amsterdam) 123(4): 537		[Abstract]
Marler, TE; Snyder, LR; Shaw, CA	2010	Cycas micronesica (Cycadales) plants devoid of endophytic cyanobacteria increase in beta-methylamino-L-alanine	Toxicon 56(4): 563-8		[Abstract]
Marler, TE; Terry, LI	2011	Arthropod invasion disrupts Cycas micronesica seedling recruitment	Commun Integr Biol 4(6): 778-80		[Abstract]
Marsh, AS	1914	Notes on the anatomy of Stangeria paradoxa.	New Phytol. : 18-30
Marshall, JK	2007	Water economy of Macrozamia riedlei in the Jarrah (Eucalyptus marginata) forest of Southwestern Australia	Mem. New York Bot. Gard. 97: 204-222
Martínez, LCA; Artabe, AE; Bodnar, J	2012	A new cycad stem from the Cretaceous in Argentina and its phylogenetic relationships with other Cycadales	Bot. J. Linn. Soc. 170(3): 436-458		[Abstract]
Martinez, LCA; Ottone, EG; Artabe, AE	2018	A new cycad trunk from the Palaeocene in the Neuquen Basin, Patagonia (Argentina)	Review Palaeobotany & Palynology 256: 1-12		[Abstract]
Martínez-Domínguez, L; Nicolalde-Morejón, F; Lorea-Hernández, FG; Vergara-Silva,	2020	A novelty in Ceratozamia (Zamiaceae, Cycadales) from the Sierra Madre del Sur, Mexico: Biogeographic and morphological patterns, DNA barcoding and phenology	PhytoKeys 156: 1-25	Ceratozamia leptoceras protologue
Martínez-Domínguez, L; Nicolalde-Morejón, F; Stevenson, DW	2017	Qualitative and quantitative morphological evidence for recognition of a new species within Ceratozamia (Zamiaceae) from Mexico	Phytotaxa 317: 17-28		[Abstract]
Martínez-Domínguez, L; Nicolalde-Morejón, F; Stevenson, DW; Vergara-Silva, F	2017	A new Species of Ceratozamia (Zamiaceae) from the Sierra Norte of Puebla, Mexico	Brittonia 69(4): 516-523
Martínez-Domínguez, L; Nicolalde-Morejón, F; Vergara-Silva, F; Stevenson, DW	2016	Integrative taxonomy of Mexican cycads: Biogeography, morphology and DNA barcoding corroborate a new sympatric species in Ceratozamia (Zamiaceae)	Phytotaxa 268(1): 25-45	Ceratozamia subroseophylla protologue
Martínez-Domínguez, L; Nicolalde-Morejón, F; Vergara-Silva, F; Stevenson, DW	2016	Integrative taxonomy of Mexican cycads: biogeography, morphology and DNA barcoding corroborate a new sympatric species in Ceratozamia (Zamiaceae)	Phytotaxa 268(1): 25-45
Martínez-Domínguez, L; Nicolalde-Morejón, F; Vergara-Silva, F; Stevenson, DW	2018	Taxonomic review of Ceratozamia (Zamiaceae) in the Sierra Madre Oriental, Mexico	PhytoKeys 100(100): 91-124		[Abstract]
Martínez-Domínguez, L; Nicolalde-Morejón, F; Vergara-Silva, F; Stevenson, DW	2020	Pollination of cycads in an urban environment	Botany 98(6): 333-339		[Abstract]
Martínez-Domínguez, L; Nicolalde-Morejón, F; Vergara-Silva, F; Stevenson, DW	2022	Ceratozamia oliversacksii (Zamiaceae), a new species of gymnosperm from western Oaxaca, Mexico	Kew Bull. : 1-9	Ceratozamia oliversacksii protologue
Martinez-Lendech, NC-A, A; Serrano-Meneses, M A	2007	Body size and fat reserves as possible predictors of male territorial status and contest outcome in the butterfly Eumaeus toxea Godart (Lepidoptera : Lycaenidae)	Journal of Ethology 25(2): 195-199		[Abstract]
Masters, MT	1868	The Ghent International Exhibition	Gard. Chron. 25(14): 348-350
Masters, MT	1877	Macrozamia mackenzii	Gard. Chron., n.s. 7(178): 665
Masters, MT	1878	New garden plants	Gard. Chron., n.s. 10: 810-811
McConnell, J	2004	Cyanobacteria, cycads, Chiroptera, and the Chamorro	Lancet Infectious Diseases 4(7): 391-391
McDaniel, I	2002	Cycad focus: Encephalartos arenarius	Cycad Newslett. 25(4): 14-15
McDaniel, I	2004	Growing Zamia splendens in California	Cycad Newslett. 27(2): 11
McDaniel, I	2005	Notes on Zamia pygmaea	Cycad Newslett. 28(1): 11
McVaugh, R; Pérez de la Rosa, JA	1992	Dioon edule var sonorense	Fl. Novo-Galiciana 17: 112-114
Medeghini-Bonatti, P; Baroni-Fornasiero, R	1990	Developmental pattern and structural organization of leaf chloroplasts in Lepidozamia peroffskyana.	Austral. J. Bot. 38(1): 53-62		[Abstract]
Medeghini-Bonatti, P; Sabato, S	1984	Plastid ultrastructure in leaves of Macrozamia moorei (Zamiaceae).	Caryologia 37(1-2): 133-140
Medellín-Leal, F	1963	A new species of Ceratozamia from San Luis Potosí	Brittonia 15(2): 175-176	Ceratozamia zaragozae
Medina-Villarreal, A; Gonzalez-Astorga, J; Espinosa de Los Monteros, A	2019	Evolution of Ceratozamia cycads: A proximate-ultimate approach	Mol Phylogenet Evol 139		[Abstract]
Meerow, AW; Francisco-Ortega, J; Ayala-Silva, T; Stevenson, DW; Nakamura, K	2012	Population genetics of Zamia in Puerto Rico, a study with ten SSR loci	Mem. New York Bot. Gard. 106: 204-223
Meerow, AW; Francisco-Ortega, J; Calonje, M; Griffith, MP; Ayala-Silva, T; Steve	2012	Zamia (Cycadales: Zamiaceae) on Puerto Rico: asymmetric genetic differentiation and the hypothesis of multiple introductions	Amer. J. Bot. 99(11): 1828-39		[Abstract]
Meerow, AW; Nakamura, K	2007	Ten microsatellite loci from Zamia integrifolia (Zamiaceae)	Molecular Ecology Notes 7(5): 824-826		[Abstract]
Meerow, AW; Salas-Leiva, DE; Calonje, M; Francisco-Ortega, J; Griffith, MP; Naka	2018	Contrasting Demographic History and Population Structure of Zamia (Cycadales: Zamiaceae) on Six Islands of the Greater Antilles Suggests a Model for Population D	International Journal of Plant Sciences 179(9): 730-757		[Abstract]
Meerow, AW; Salas-Leiva, DE; Francisco-Ortega, J; Griffith, MP; Calonje, M; Stev	2018	Phylogeography and Conservation Genetics of the Caribbean Zamia Clade: An Integrated Systematic Approach with SSRs and Single Copy Nuclear Genes	Mem. New York Bot. Gard. 117: 278-296
Meerow, AW; Stevenson, DW; Moynihan, J; Francisco-Ortega, J	2007	Unlocking the coontie conundrum: the potential of microsatellite DNA studies in the Caribbean Zamia pumila complex (Zamiaceae)	Mem. New York Bot. Gard. 97: 484-518
Melville, R	1957	Encephalartos in Central Africa	Kew Bull. 12(2): 237-257
Merello, M	2003	Zamiaceae. In: Manual de Plantas de Costa Rica (Vol. 2), B.E. Hammel, M.H. Grayum, C. Herrera & N. Zamora (eds.)	Monogr. Syst. Bot. Missouri Bot. Gard. 92: 14-16
Merrill, ED	1936	A new Philippine species of Cycas	Philipp. J. Sci. 60(3): 233-239	Protologue description(s): Cycas wadei
Meurergrimes, BS, D W	1994	The biflavones of the Cycadales revisited: Biflavones in Stangeria eriopus, Chigua restrepoi and 32 other species of Cycadales	Biochemical Systematics and Ecology 22(6): 595-603		[Abstract]
Milindasuta, BE	1975	Developmental anatomy of coralloid roots in cycads.	Amer. J. Bot. 62(5): 468-472
Miller, G	2006	Guam's deadly stalker: on the loose worldwide?	Science 313: 428-432
Miller, WL	1919	Polyxylic stem of Cycas media.	Bot. Gaz. 68: 208-221
Miquel, FA	1838	Note additionelle sur une autre espèce du mème genre	Bull. Sci. Phys. Nat. Néerl. 1: 11-12
Miquel, FA	1838	Note sur l'Encephalartus horridus Lehm. es sur ses différentes formes	Ann. Sci. Nat., Bot. sér. 2, 10: 366-369
Miquel, FA	1842	Monographia Cycadearum	Monogr. Cycad. : 1-82
Miquel, FA	1843	De Cycadeis loddigesianis	Tijdschr. Natuurl. Gesch. Physiol. 10: 68-74
Miquel, FA	1844	Addenda ad synopsin cycadearum viventium	Linnaea 18(1): 96-98
Miquel, FA	1844	Genera et species Cycadearum viventium	Linnaea 17(6): 675-744
Miquel, FA	1844	Ueber den bau eines erwachsenen Stammes von Cycas circinalis	Linnaea 18: 125-144
Miquel, FA	1847	Over eenige nieuwe of zeldzame Cycadeen in den Hortus Botanicus te Amsterdam. Eerste gedeltee	Tijdschr. Wis- Natuurk. Wetensch. Eerste Kl. Kon. Ned. Inst. Wetensch. 1(1): 33-43
Miquel, FA	1847	Over eenige nieuwe of zeldzame Cycadeen in den Hortus Botanicus te Amsterdam. Tweede gedeelte. Over de onlangs op nieuw ontdekte Cycas inermis, Lour.	Tijdschr. Wis- Natuurk. Wetensch. Eerste Kl. Kon. Ned. Inst. Wetensch. 1(2): 103-110
Miquel, FA	1848	Over eenige nieuwe of zeldzame Cycadeen in den Hortus Botanicus te Amsterdam. Derde gedeelte	Tijdschr. Wis- Natuurk. Wetensch. Eerste Kl. Kon. Ned. Inst. Wetensch. 1(4): 197-208
Miquel, FA	1849	Epicrisis systematis cycadearum	Tijdschr. Wis- Natuurk. Wetensch. Eerste Kl. Kon. Ned. Inst. Wetensch. 2(4): 1-302
Miquel, FA	1851	Cycadeae quaedam Americanae: Partim novae	Nieuwe Verh. Eerste Kl. Kon. Ned. Inst. Wetensch. Amsterdam 3(4): 181-188
Miquel, FA	1851	Over de rangschikking der fossiele Cycadeae	Tijdschr. Wis- Natuurk. Wetensch. Eerste Kl. Kon. Ned. Inst. Wetensch. 4: 205-227
Miquel, FA	1861	Prodromus systematis cycadearum	Prodr. Syst. Cycad. 10: 1-27
Miquel, FA	1863	Over de Cycadeen in Nieuw-Holland	Verslagen Meded. Afd. Natuurk. Kon. Akad. Wetensch. 15: 363-377
Miquel, FA	1863	Ueber eine neue Cycas aus Siam	Bot. Zeitung (Berlin) 21: 333-334
Miquel, FA	1868	Noveaux matériaux pour servir á la connaissance des Cycadées. Cinquiéme partie, Cycadées de L'Amérique	Arch. Néerl. Sci. Exact. Nat. 3: 417-427
Miquel, FA	1868	Noveaux matériaux pour servir á la connaissance des Cycadées. Deuxieme partie. Encephalartos barteri.	Arch. Néerl. Sci. Exact. Nat. 3: 241-246
Miquel, FA	1868	Noveaux matériaux pour servir á la connaissance des Cycadées. Premiere partie. Organes sexuels. Cycas.	Arch. Néerl. Sci. Exact. Nat. 3: 193-241
Miquel, FA	1868	Noveaux matériaux pour servir á la connaissance des Cycadées. Troisieme partie. Cycadées de la Nouvelle-Hollande extratropicale	Arch. Néerl. Sci. Exact. Nat. 3: 246-254
Miquel, FA	1869	Nieuwe bijdragen tot de kennis der Cycadaceen	Verslagen Meded. Afd. Natuurk. Kon. Akad. Wetensch., ser. 2 3(1): 1-57
Miquel, FA	1870	Noveaux matériaux pour servir á la connaissance des Cycadées. Sixieme partie. Revision. Classification.	Adansonia 9: 352-367
Miquel, FAW	1839	Note sur la prefoliation des Cycadees	Bull. Sci. Phys. Nat. Néerl. 2: 45	Cycas rumphii protologue
Miquel, FAW	1840	De Quibsdam cycadeis minus cognitis	Comm. Phytogr. : 110-132	Cycas glauca protologue
Miringu, BW; Beentje, H	1999	Encephalartos tegulaneus subsp. powysii (Zamiaceae): a new cycad in central Kenya	J. E. Afr. Nat. Hist. 88: 35-39	Encephalartos tegulaneus subsp. powysii protologue
Mitchell, B; Hu, X	2018	The Neurotoxic Effects of Cycads and Metals: A Review	Not given		[Abstract]
Monson, C; Cox, PA	2003	Conservation implications of Chamorro consumption of flying foxes as a possible cause of amyotrophic lateral sclerosis-Parkinsonism dementia complex in Guam	Conservation Biology 17(3): 678-686		[Abstract]
Moon, PA; Litz, RE; Chavez, VM	2004	Effect of gelling agent on growth and development of Ceratozamia hildae somatic embryos.	Bot. Rev. (Lancaster) 70(1): 47-53
Moore, C	1884	Notes on the genus Macrozamia	J. Proc. Roy. Soc. New S. Wales 17: 115-122
Moore, D	1878	On a supposed new species of Ceratozamia	Sci. Proc. Roy. Dublin Soc., n.s., 2: 112-114	Ceratozamia fusca-viridis
Morassi-Bonzi, L; Medeghini-Bonatti, P; Marini, C; Baroni-Fornasiero, R; Paolett	1992	Ultrastuctural studies on differentiating chloroplasts in the forma fuscoviridis of Ceratozamia mexicana Brogn	New Phytol. 120(30): 427-434
Moretti, A	1990	Cytotaxonomy of cycads	Mem. New York Bot. Gard. 57: 114-122
Moretti, A	1990	Karyotypic data on North and Central American Zamiaceae (Cycadales) and their phylgenetic implications.	Amer. J. Bot. 77(8): 1016-1029
Moretti, A; Caputo, P; Cozzolino, S; De Luca, P; Gaudio, L; Siniscalco Gigliano,	1993	A phylogenetic analysis of Dioon (Zamiaceae).	Amer. J. Bot. 80(2): 204-212
Moretti, A; Caputo, P; Cozzolino, S; Gaudio, L	1993	Karyotypes of New World cycads	Proc. Second Int. Conf. Cycad Biol. : 263-269
Moretti, A; Caputo, P; Gaudio, L; Stevenson, DW	1991	Intraspecific chromosome variants in Zamia (Zamiaceae, Cycadales).	Caryologia 44(1): 1-10
Moretti, A; De Luca, P; Sclavo, JP; Stevenson, DW	1989	Encephalartos voiensis (Zamiaceae), a new East Central African species in the E. hildebrandtii complex	Ann. Missouri Bot. Gard. 76(3): 934-938
Moretti, A; Sabato, S	1988	Systematics and evolution of Dioon and Ceratozamia	Fairchild Trop. Gard. Bull. 43(1): 22-28
Moretti, A; Sabato, S; Siniscalco Gigliano, G	1981	Distribution of macrozamin in Australasian cycads.	Phytochemistry 20(6): 1415-1416
Moretti, A; Sabato, S; Siniscalco Gigliano, G	1983	Taxonomic significance of methylazoxymethanol glycosides in the cycads	Phytochemistry 22(1): 115-117
Moretti, A; Sabato, S; Vázquez-Torres, M	1982	The rediscovery of Ceratozamia kuesteriana (Zamiaceae) in Mexico	Brittonia 34(2): 185-188
Mound, LA; Terry, I	2001	Thrips pollination of the Central Australian cycad, Macrozamia macdonnellii (Cycadales).	Int. J. Pl. Sci. 162(1): 147-154
Moynihan, J; Meerow, AW; Francisco-Ortega, J	2006	Isolation, characterization and cross-species amplification of microsatellite loci in the cycad genus Dioon (Zamiaceae). Potential utilization in population gene	Molecular Ecology Notes 7(1): 72-74		[Abstract]
Moynihan, J; Stevenson, DW; Lewis, C; Vovides, AP; Caputo, P; Francisco-Ortega,	2012	A phylogenetic study of Dioon Lindl. (Zamiaceae, Cycadales), based on morphology, nuclear ribosomal DNA, a low- copy nuclear gene, and plastid RFLPs	Mem. New York Bot. Gard. 106: 448-479
Moynihan, J; Vovides, AP; González-Astorga, J; Francisco-Ortega, J	2012	Population genetic diversity in the Dioon edule Lindl. species complex (Zamiaceae, Cycadales): Evidence from Microsatellite Data	Mem. New York Bot. Gard. 106: 224-250
Mueller, FJ	1858	Macrozamia Denisonii	Fragm. (Mueller) 12
Mueller, FJ	1859	Cycadeae. Macrozamia Pauli Guilielmi	Fragm. (Mueller) 1: 86-87
Mueller, FJ	1874	Cycadeae. Cycas normanbyana	Fragm. (Mueller) 86
Mueller, FJ	1876	Cycadeae. Cycas cairnsiana	Fragm. (Mueller) 10: 63
Mueller, FJ	1885	Succinct notes on some plants from New Guinea	Vict. Naturalist 2(2): 18-20	Cycas scratchleyana protologue
Mueller, FV	1876	Cycas cairnsiana	Fragm. (Mueller)	Cycas cairnsiana protologue
Mueller, FV	1876	Cycas papuana	Descr. Notes Papuan Pl. 4: 71-72	Cycas papuana protologue
Mueller, FV	1881	Notes on a hitherto undefined species of Encephalartos	Australas. Chem. Druggist 4: 84-85	Macrozamia moorei protologue
Muniappan, R; Viraktamath, CA	2006	The Asian cycad scale Aulocaspis yasumatsui, a threat to native cycads in India	Current Science 91(7): 868-870
Murray, AE	1983	Notae spermatophytae no. 2	Kalmia 13: 3-11
Muthukumar, T; Udaiyan, K	2002	Arbuscular mycorrhizas in cycads of southern India	Mycorrhiza 12(4): 213-7		[Abstract]
Nagalingum, NS; Marshall, CR; Quental, TB; Rai, HS; Little, DP; Mathews, S	2011	Recent synchronous radiation of a living fossil	Science 334(6057): 796-9		[Abstract]
Nairn, CJ; Ferl, RJ	1988	The complete nucleotide sequence of the small-subunit ribosomal RNA coding region for the cycad Zamia pumila: phylogenetic implications	J Mol Evol 27(2): 133-41		[Abstract]
Nash, RJ; Bell, EA; Ackery, PR	1992	The protective role of cycasin in cycad-feeding Lepidoptera	Phytochemistry 31(6): 1955-1957
Nathanielsz, CP; Staff, IA	1975	A mode of entry of blue-green algae into the apogeotrophic roots of Macrozamia communis.	Amer. J. Bot. 62(3): 232-235
Nathanielsz, CP; Staff, IA	1975	On the occurrence of intracellular blue-green algae in cortical cells of the apogeotrophic roots of Macrozamia communis L. Johnson	Ann. Bot. (Oxford), n.s. 39(3): 363-368
Nazor, C	2003	Growing Cycas panzhihuaensis in Central Texas	Cycad Newslett. 26(4): 13
Nazor, C	2004	Growing Bowenia serrulata in Central Texas	Cycad Newslett. 27(4): 13
Nazor, C	2004	Growing Encephalartos ferox in Central Texas	Cycad Newslett. 27(3): 10
Nazor, C	2004	Lepidozamia peroffskyana in Texas	Cycad Newslett. 27(1): 13
Nazor, C	2005	Growing Zamia vazquezii in central Texas	Cycad Newslett. 28(3-4): 29
Nazor, C	2006	Growing Ceratozamia kuesteriana in Texas	Cycad Newslett. 29(2,3): 11-12
Nazor, C	2006	Growing Macrozamia moorei in Central Texas	Cycad Newslett. 29(2,3): 18
Nazor, C	2007	How Cycas taitungensis found its name	Cycad Newslett. 30(3): 8-10
Nazor, C	2008	Cycad Focus: Macrozamia riedlei	Cycad Newslett. 31(2,3): 13-15
Nazor, C	2008	Growing Encephalartos horridus and E. lehmannii in Central Texas	Cycad Newslett. 31(1): 10
Nazor, C	2012	Growing Dioon spinulosum in Texas	Cycad Newslett. 35(2): 13
Nazor, C; Lindström, AJ	2010	Cycas petraea	Cycad Newslett. 33(3): 10-13
Negrón-Ortiz, V; Breckon, GJ	1989	Population structure in Zamia debilis (Zamiaceae). I. Size classes, leaf phenology, and leaf turnover.	Amer. J. Bot. 76(6): 891-900
Negrón-Ortiz, V; Gorchov, DL	2000	Effects of fire season and postfire herbivory on the cycad Zamia pumila (Zamiaceae) in slash pine savanna, Everglades National Park, Florida.	Int. J. Pl. Sci. 161(4): 659-669
Negrón-Ortiz, V; Gorchov, DL; Breckon, GJ	1996	Population structure in Zamia (Zamiaceae) in northern Puerto Rico. II. Seed germination and stage-structured population projection.	Int. J. Pl. Sci. 157(5): 605-614
Nelson, C	2006	Dos plantas nuevas del género Zamia (Zamiaceae, Gymnospermae) en Honduras	Ceiba 46(1): 41-44
Nelson, C; Sandoval Gonzáles, GG	2008	Una especie nueva de Zamia (Zamiaceae) de Honduras	Ceiba 49(1): 135-136
Newell, SJ	1983	Reproduction in a natural population of cycads (Zamia pumila L.) in Puerto Rico	Bull. Torrey Bot. Club 110(4): 464-473
Newell, SJ	1985	Intrapopulational variation in leaflet morphology of Zamia pumila in relation to microenvironment and sex.	Amer. J. Bot. 72(2): 217-221
Newell, SJ	1989	Variation in leaflet morphology among populations of Caribbean cycads (Zamia	Amer. J. Bot. 76(10): 1518-1523
Newton, LE	1978	A new cycad subspecies from Nigeria	Bot. J. Linn. Soc. 77(2): 125-129	Encephalartos barteri subsp. allochrous
Newton, LE	2002	A new species of Encephalartos (Zamiaceae) in Sudan	Bot. J. Linn. Soc. 140(2): 187-192	Encephalartos mackenziei
Nicolalde-Morejón, F	2007	Taxonomía, distribución, y estado de conservación de Zamia en Ecuador	Mem. New York Bot. Gard. 97: 45-63
Nicolalde-Morejón, F; Avendaño, S	2011	Lectotypification of Ceratozamia mixeorum (Zamiaceae)	Revista Mex. Biodivers. 82: 1032-1033
Nicolalde-Morejón, F; González-Astorga, J; Vergara-Silva, F; Stevenson, DW; Roja	2014	Biodiversidad de Zamiaceae en México	Revista Mex. Biodivers. 85: 114
Nicolalde-Morejón, F; Martínez-Domínguez, L; Stevenson, DW; Vergara-Silva, F	2019	Disentangling the identity of Zamia from Mexican Pacific seaboard, with a description of a new species	Nordic J. Bot. 37(9): 1-11
Nicolalde-Morejón, F; Vergara-Silva, E; González-Astorga, J; Vovides, AP; de los	2009	Reciprocal illumination of morphological characters upon a molecular hypothesis supports the proposal of a new species of cycad from Mexico	Syst. Biodivers. 7(1): 73-79
Nicolalde-Morejón, F; Vergara-Silva, F; Gonzalez-Astorga, J; Stevenson, DW	2010	Character-based, population-level DNA barcoding in Mexican species of Zamia L. (Zamiaceae: Cycadales)	Mitochondrial DNA 21 Sup: 51-9		[Abstract]
Nicolalde-Morejón, F; Vergara-Silva, F; González-Astorga, J; Stevenson, DW; Vovi	2011	A character-based approach in the Mexican cycads supports diverse multigene combinations for DNA barcoding	Cladistics 27(2): 150-164		[Abstract]
Nicolalde-Morejón, F; Vergara-Silva, F; Vovides, AP	2011	Systematic perspectives on Zamia (Zamiaceae) in Megamexico: from alpha taxonomy to genetic barcodes	Revista Mex. Biodivers. 82(2): 341-355		[Abstract]
Nicolalde-Morejón, F; Vovides, AP; Stevenson, DW	2009	Taxonomic revision of Zamia in Mega-Mexico	Brittonia 61(4): 301-335
Nicolalde-Morejón, F; Vovides, AP; Stevenson, DW; Sosa, V	2008	The identity of Zamia katzeriana and Z. verschaffeltii (Zamiaceae)	Brittonia 60(1): 38-48		[Abstract]
Niklas, KJ; Cobb, ED; Marler, TE	2006	A comparison between the record height-to-stem diameter allometries of pachycaulis and leptocaulis species.	Ann. Bot. (Oxford), n.s. 97(1): 79-83
Niklas, KJ; Marler, TE	2008	Sex and Population Differences in the Allometry of an Endangered Cycad Species,Cycas micronesica(Cycadales)	International Journal of Plant Sciences 169(5): 659-665		[Abstract]
Niklas, KJ; Norstog, K	1984	Aerodynamics and pollen grain depositional patterns on cycad megastrobili - Implications on the reproduction of three cycad genera (Cycas. Dioon, and Zamia)	Bot. Gaz. 145(1): 92-104
Nishida, MY; Nishida, H	1996	Cretocycas yezonakajimae gen et sp nov, a permineralized Cycad petiole from the Upper Cretaceous of Hokkaido	J. Japanese Botany 71(4): 223-230		[Abstract]
Noe, AC	1921	Cycad like leaves from the Permian of Texas	Geological Soc. America Bull. 32(1): 134
Norstog, K	1965	Induction of apogamy in megagametophytes of Zamia integrifolia	Amer. J. Bot. 52(10): 993-999
Norstog, K	1967	Fine structure of the spermatozoid of Zamia with special reference to the flagellar apparatus	Amer. J. Bot. 54(7): 831-840
Norstog, K	1972	Role of archegonial neck cells of Zamia and other cycads	Phytomorphology 23(2): 125-130
Norstog, K	1977	The spermatozoid of Zamia chigua Seem.	Bot. Gaz. 138(4): 409-412
Norstog, K	1981	Karyotypes of Zamia chigua (Cycadales).	Caryologia 34(3): 255-260
Norstog, K	1986	The blepharoplast of Zamia pumila L..	Bot. Gaz. 147(1): 40-46
Norstog, K	1987	Cycad hybridization studies	Fairchild Trop. Gard. Bull. 42(3): 20-23
Norstog, K	1987	Cycads and the origin of insect pollination	American Scientist 75: 270-279
Norstog, K	1990	Spermatozoids of Microcycas calocoma: ultrastructure	Bot. Gaz. 151(3): 275-284
Norstog, K	1990	Studies of cycad reproduction at Fairchild Tropical Garden	Mem. New York Bot. Gard. 57: 63-81
Norstog, K	1993	Spermatogenesis in Microcycas: evolutionary significance of male gametes of seed plants	Proc. Second Int. Conf. Cycad Biol. : 270-278
Norstog, K; Fawcett, PKS	1989	Insect-cycad symbiosis and its relation to the pollination of Zamia furfuracea (Zamiaceae) by Rhopalotria mollis (Curculionidae).	Amer. J. Bot. 76(9): 1380-1394
Norstog, K; Fawcett, PKS; Vovides, AP; Dunn, MW	1993	Toxicity and insect-cycad symbiosis in Zamia furfuracea	Proc. Second Int. Conf. Cycad Biol. : 42-50
Norstog, K; Nicholls, TJ	1997	The biology of the cycads
Norstog, K; Rhamstine, E	1967	Isolation and culture of haploid and diploid cycad tissues	Phytomorphology 17: 374-381
Norstog, K; Stevenson, DW	2004	Comparative development of the spermatozoids of cycads and Ginkgo biloba	Bot. Rev. (Lancaster) 70(1): 5-15		[Abstract]
Norstog, K; Vovides, AP	1992	Beetle pollination of two species of Zamia: evolutionary and ecological considerations	Paleobotanist 41: 149-158
Nunn, PB; Ponnusamy, M	1993	a-Amino-B-methylaminopropionic acid: a neurotoxin from Cycas species	Proc. Second Int. Conf. Cycad Biol. : 51-56
O'Brien C, W; Tang, W	2015	Revision of the New World cycad weevils of the subtribe Allocorynina, with description of two new genera and three new subgenera (Coleoptera: Belidae: Oxycorynin	Zootaxa 3970(1): 1-87		[Abstract]
Obukowicz, M; Schaller, M; Kennedy, GS	1987	Ultrastructure and phenolic histochemistry of the Cycas revoluta - Anabaena symbiosis	New Phytol. 87(4): 751-760
Octavio-Aguilar, P; Gonzalez-Astorga, J; Vovides, AP	2009	Genetic diversity through life history of Dioon edule Lindley (Zamiaceae, Cycadales)	Plant Biol (Stuttg) 11(4): 525-36		[Abstract]
Octavio-Aguilar, P; Vovides, AP	2008	Population dynamics of the Mexican cycad Dioon edule Lindl. (Zamiaceae): life history stages and management impact	Bot. J. Linn. Soc. 157(3): 381-391		[Abstract]
Okajima, S	2000	The first Cycad associated thrips in the family Phlaeothripidae, Stomothrips cycasi, gen et sp nov (Thysanoptera)	Inertebrate Taxonomy 14(5): 705-708		[Abstract]
Olson, K; Gorelick, R	2011	Chromosomal fission accounts for small-scale radiations in Zamia (Zamiaceae; Cycadales)	Bot. J. Linn. Soc. 165(2): 168-185		[Abstract]
Ornduff, R	1985	Male-biased sex ratios in the cycad Macrozamia riedlei (Zamiaceae)	Bull. Torrey Bot. Club 112(4): 393-397
Ornduff, R	1989	Size distribution and coning behavior of the Australian cycad Lepidozamia peroffskyana	Austral. J. Ecol. 14(2): 241-246
Ornduff, R	1990	Geographic variation in reproductive behaviour and size structure of the Australian cycad Macrozamia communis (Zamiaceae).	Amer. J. Bot. 77(1): 92-99
Ornduff, R	1991	Size classes, reproductive behavior, and insect associates of Cycas media (Cycadaceae) in Australia.	Bot. Gaz. 152(2): 203-207
Ornduff, R	1992	Features of coning and foliar phenology, size classes , and insect associates of Cycas armstrongii (Cycadaceae) in the Northern Territory, Australia	Bull. Torrey Bot. Club 119(1): 39-43
Ornduff, R	1993	Features of the reproductive biology of Macrozamia species and Cycas media in Australia	Proc. Second Int. Conf. Cycad Biol. : 121-124
Ornduff, R	1996	Gender performance in a cultivated cohort of the cycad Zamia integrifolia (Zamiaceae).	Amer. J. Bot. 83(8): 1006-1015
Osborne, R	1985	Sex change in cycads hope for woodii?	Encephalartos 2: 20-22
Osborne, R	1986	Focus on Encephalartos woodii	Encephalartos 5: 4-10
Osborne, R	1987	African cycads	Fairchild Trop. Gard. Bull. 42(3): 14-16
Osborne, R	1987	Focus on Encephalartos ferox	Encephalartos 9: 14-21
Osborne, R	1987	Focus on Encephalartos ghellinckii	Encephalartos 12: 16-23
Osborne, R	1987	Focus on Encephalartos villosus	Encephalartos 10: 16-23
Osborne, R	1988	Focus on Encephalartos barteri	Encephalartos 14: 8-16
Osborne, R	1988	Focus on Encephalartos lanatus	Encephalartos 16: 3-9
Osborne, R	1988	Focus on Encephalartos lebomboensis	Encephalartos 15: 6-15
Osborne, R	1989	Cycad pollen survives ultra-low temperature.	Encephalartos 17: 25
Osborne, R	1989	Focus on Encephalartos eugene-maraisii	Encephalartos 17: 9-13
Osborne, R	1989	Focus on Encephalartos laevifolius	Encephalartos 19: 2-8
Osborne, R	1989	Focus on Encephalartos transvenosus	Encephalartos 20: 10-18
Osborne, R	1990	Focus on Encephalartos hildebrandtii	Encephalartos 22: 6-12
Osborne, R	1990	Focus on Encephalartos umbeluziensis	Encephalartos 21: 3-9
Osborne, R	1990	Micropropagation in cycads	Mem. New York Bot. Gard. 57: 82-88
Osborne, R	1991	Focus on Encephalartos gratus	Encephalartos 25: 4-9
Osborne, R	1991	Focus on Encephalartos paucidentatus	Encephalartos 27: 3-9
Osborne, R	1992	Focus on Encephalartos inopinus	Encephalartos 31: 4-8
Osborne, R	1993	A conservation strategy for the South African cycads	Proc. Second Int. Conf. Cycad Biol. : 341-349
Osborne, R	1993	Focus on Encephalartos concinnus	Encephalartos 34: 4-11
Osborne, R	1993	Focus on Encephalartos munchii	Encephalartos 35: 4-9
Osborne, R	1993	Focus on Encephalartos trispinosus	Encephalartos 33: 4-12
Osborne, R	1993	The cycad society of Southern Africa	Proc. Second Int. Conf. Cycad Biol. : 350-351
Osborne, R	1994	Focus on Encephalartos manikensis	Encephalartos 38: 4-11
Osborne, R	1995	The world Cycad census and a proposed revision of the threatened species status for Cycad taxa	Biological Conservation 71(1): 1-12		[Abstract]
Osborne, R	1997	Focus on Macrozamia moorei	Encephalartos 49: 4-9
Osborne, R	1998	Focus on Macrozamia lucida	Encephalartos 56: 4-9
Osborne, R	1999	Focus on Lepidozamia peroffskyana	Encephalartos 58: 4-11
Osborne, R	1999	Focus on Macrozamia macdonnellii	Encephalartos 59: 4-7
Osborne, R	2000	Focus on Lepidozamia hopei	Encephalartos 64: 12-16
Osborne, R	2000	Focus on Macrozamia platyrachis	Encephalartos 61: 4-8
Osborne, R	2002	Focus on - cycad fossils	Encephalartos
Osborne, R	2003	Focus on Macrozamia douglasii	Encephalartos 74: 6-11
Osborne, R	2004	What controls coning in Cycas revoluta?	Proc. Sixth Int. Conf. Cycad Biol. : 142-149
Osborne, R	2005	Focus on Cycas tropophylla	Encephalartos 82: 8-13
Osborne, R	2005	Focus on Dioon caputoi	Encephalartos 83: 15-23
Osborne, R	2005	The enigmatic Encephalartos laurentianus	Cycad Newslett. 28(3-4): 27-28
Osborne, R	2006	Focus on Macrozamia dyeri	Encephalartos 88: 8-16
Osborne, R	2008	Some notes on Encephalartos horridus (Jacq.) Lehm.	Cycad Newslett. 31(1): 8-9
Osborne, R	2011	Cycas revoluta - more names than any other cycad!	Cycad Newslett. 34(2,3): 36
Osborne, R	2011	Focus on Cycas scratchleyana F.Muell.	Encephalartos 103: 9-13
Osborne, R	2012	Taxonomy of Dioon spinulosum Dyer ex Eichler	Cycad Newslett. 35(2): 8
Osborne, R; Calonje, A; Hill, KD; Stanberg, L; Stevenson, DW	2012	The world list of cycads	Mem. New York Bot. Gard. 106: 480-508
Osborne, R; Calonje, M; Hill, KD; Stanberg, L; Stevenson, DW	2015	CITES and Cycads: Checklist	CITES and Cycads: A User's Guide : 64-114
Osborne, R; Forster, PI	2008	Focus on Macrozamia viridis	Encephalartos 95: 11-14
Osborne, R; Gorelick, R	2007	Sex change in cycadscases, causes, and chemistry	Mem. New York Bot. Gard. 97: 335-345
Osborne, R; Gregory, TJ	2009	Focus on Dioon merolae	Encephalartos 97: 12-17
Osborne, R; Grobbelaar, N; Vincent, PLD	1993	A numerical phenetic study of the genus Encephalartos lehm	Proc. Second Int. Conf. Cycad Biol. : 279-280
Osborne, R; Hill, KD; Nguyên, TH; Lôc, PK	2006	Focus on Cycas hoabinhensis	Encephalartos 87: 9-13
Osborne, R; Nair, JJ	1993	Potential errors in the determination of methylazoxymethanol glycosides in plant material	Proc. Second Int. Conf. Cycad Biol. : 57-60
Osborne, R; Nguyên, TH	2002	Focus on Cycas elongata	Encephalartos 72: 4-9
Osborne, R; Nicolalde-Morejón, F; Vovides, AP	2008	Focus on Zamia lacandona	Encephalartos 94: 11-14
Osborne, R; Ottley, H; Randall, L	2007	Focus on Cycas calcicola	Encephalartos 92: 10-16
Osborne, R; Pérez-Farrera, MA	2007	Focus on Ceratozamia norstogii	Encephalartos 90: 13-15
Osborne, R; Randall, L	2007	Focus on Macrozamia concinna	Encephalartos 89: 8-12
Osborne, R; Randall, L; Chemnick, J	2006	Focus on Macrozamia johnsonii	Encephalartos 85: 9-180
Osborne, R; Robbertse, PJ; Claassen, I	1992	The longevity of cycad pollen in storage	S. African J. Bot. 58(4): 250-254
Osborne, R; Salatino, A; Salatino, MLF	1989	Alkanes of foliar epicuticular waxes of the genus Encephalartos.	Phytochemistry 28(11): 3027-3030
Osborne, R; Salatino, A; Salatino, MLF; Sekiya, CM; Vázquez-Torres, M	1993	Alkanes of foliar epicuticular waxes from five cycad genera in the Zamiaceae.	Phytochemistry 33(3): 607-609
Osborne, R; Santana, RM	1995	Focus on Microcycas calocoma	Encephalartos 42: 4-11
Osborne, R; Stevens, JF	1996	Epicuticular waxes and glaucousness of Encephalartos leaves.	Phytochemistry 42(5): 1335-1339
Osborne, R; Stevenson, DW; Vovides, AP	2006	What is Ceratozamia fuscoviridis?	Delpinoa 48: 5-10
Osborne, R; Tang, W	2009	Focus on Zamia polymorpha	Encephalartos 98: 14-19
Osborne, R; Tomiyama, H	1995	Focus on Cycas revoluta	Encephalartos 41: 5-15
Osborne, R; van Staden, J	1987	In vitro regeneration of Stangeria eriopus	HortScience 22(6): 1326
Osborne, R; Vázquez-Torres, M	2009	Focus on Ceratozamia euryphyllidia	Encephalartos 96: 10-14
Osborne, R; Vovides, AP	2007	Focus on Zamia inermis	Encephalartos 91: 13-18
Osborne, R; Vovides, AP	2010	Focus on Ceratozamia mexicana	Encephalartos 100: 29-34
Osborne, R; Vovides, AP	2010	Focus on Zamia loddigesii	Encephalartos 99: 16-20
Ouyang, H; Zhang, SZ; Li, N; Wu, H	2004	Microsporogenesis of Cycas elongata and its systematic implication	Acta Phytotax. Sin. 42(6): 500-512		[Abstract]
Pan, M; Mabry, TJ; Beale, JM; Mamiya, BM	1997	Nonprotein amino acids from Cycas revoluta	Phytochemistry 45(3): 517-519
Pant, DD	1963	Cuticle and epidermis of recent Cycadales: leaves, sporangia and seeds	Senckenberg Biol. 44: 257-348
Pant, DD	1973	Cycas and the Cycadales. 2nd ed.	Not given
Pant, DD	1990	On the genus Glandulataenia, nov. from the Triassic of Nidhpuri, India	Mem. New York Bot. Gard. 57: 186-199
Pant, DD	1997	The aerophoric nature of the pinna base humps of Macrozamia	Phytomorphology 47(4): 345-351		[Abstract]
Pant, DD; Das, K	1990	Occurrence of non-coralloid aerial roots in Cycas.	Mem. New York Bot. Gard. 57: 56-62
Pant, DD; Das, K	1993	Cuticle, epidermis and anatomy of pinnae in some species of Cycas linn	Proc. Second Int. Conf. Cycad Biol. : 169-195
Papadopolous, S	1928	A morphological comparision of leaflets of a hybrid cycad and the two parents.	Bot. Gaz. 85: 30-45
Passalia, MG; Del Fueyo, G; Archangelsky, S	2010	An Early Cretaceous zamiaceous cycad of South West Gondwana: Restrepophyllum nov. gen. from Patagonia, Argentina	Review Palaeobotany & Palynology 161(3-4): 137-150		[Abstract]
Pearson, RH	1908	New plants at Ghent	Gard. Chron. 43(1113): 257	Encephalartos sclavoi
Pellmyr, O; Groth, I; Bergstrom, G; Thien, L B	1991	Cycad cone and Angiosperm floral volatiles: Inferences for the evolution of insect pollination	Biochemical Systematics and Ecology 19(8): 623-627		[Abstract]
Peña-García, E; Díaz Canals, L; Grillo Mensa, E	1986	Microcycas calocoma: caracteres de la semilla y su germinacíon	Revista Jard. Bot. Nac. Univ. Habana 7: 55-70
Peña-García, E; Grillo Mensa, E	1982	Proliferación de Microcycas calocoma (Miq.) A.DC. in vitro	Revista Jard. Bot. Nac. Univ. Habana 3(2): 177-196
Peña-García, E; Grillo Mensa, E; Pérez Montesinos, D	1992	Influencia de distinos factores en las posibilidades de propagación in vitro de Microcycas calocoma (Miq.) A.DC	Revista Jard. Bot. Nac. Univ. Habana 13: 83-93
Peña-García, E; Lopez García, PI; Lazcano Lara, J; Pérez Montesinos, D; Torrient	1996	La reproducción sexual en Microcycas. I. Estudios de monitoreo in situ	Revista Jard. Bot. Nac. Univ. Habana 17-18: 147-158
Peña-García, E; Lopez García, PI; Pérez Montesinos, D	1996	La reproducción sexual en Microcycas. II. El aparato reproductor masculino y la polinización como factor de riesgo	Revista Jard. Bot. Nac. Univ. Habana 17-18: 159-167
Peña-García, E; Pérez Montesinos, D	1999	Encephalartos manikensis Gilliland: obtención de juveniles pro cultivo in vitro de embriones	Revista Jard. Bot. Nac. Univ. Habana 20: 175-177
Pérez-Farr., Vovides & Iglesias	2001	A new species of Ceratozamia (Zamiaceae) from Chiapas, Mexico	Bot. J. Linn. Soc. 137(1): 77-80	Ceratozamia zoquorum
Pérez-Farrera, MA; González-Astorga, J; Avendaño, S; Iglesias, CG	2007	A new species of Ceratozamia (Zamiaceae) from the Sierra Madre of Chiapas, Mexico, with comments on species relationships	Bot. J. Linn. Soc. 153(4): 393-400	Ceratozamia vovidesii
Pérez-Farrera, MA; Gutiérrez-Ortega, JS; Haynes, JL; Chemnick, J; Salas-Morales,	2021	Ceratozamia aurantiaca (Zamiaceae): A new cycad species from the northern rainforests of Oaxaca, Mexico	Taxonomy 1(3): 243-255	Ceratozamia aurantiaca protologue
Pérez-Farrera, MA; Gutiérrez-Ortega, JS; Vovides, AP; Calonje, M; Díaz-Jiménez,	2021	Ceratozamia dominguezii (Zamiaceae): A new cycad species from southeastern Mexico	Taxonomy 1(4): 345-359	Ceratozamia dominguezii protologue
Pérez-Farrera, MA; Vovides, AP	2004	Spatial distribution, population structure and fecundity of Ceratozamia matudaeLundell (Zamiaceae) in El Triunfo Biosphere Reserve, Chiapas, Mexico.	Bot. Rev. (Lancaster) 70(2): 299-311
Pérez-Farrera, MA; Vovides, AP; Alvarez-Moctezuma, JG	1999	A study on seed germination of the cycad Dioon merolae (Zamiaceae).	New Plantsman 6(4): 214-218
Pérez-Farrera, MA; Vovides, AP; Avendaño, S	2014	Morphology and leaflet anatomy of the Ceratozamia norstogii (Zamiaceae, Cycadales) species complex in Mexico with comments on relationships and speciation	International Journal of Plant Sciences 175: 110-121
Pérez-Farrera, MA; Vovides, AP; González, D; López, S; Hernandez-Sandoval, L; Ma	2017	Estimation of genetic variation in closely related cycad species in Ceratozamia (Zamiaceae: Cycadales) using rapds markers / Variación genética en especies de cí	Revista de Biología Tropical 65(1): 303-319		[Abstract]
Pérez-Farrera, MA; Vovides, AP; González, D; Sandoval, LH; Martínez, M	2007	Variación morfológica y genética del complejo Ceratozamia miqueliana H.A. Wendl. (Cycadales, Zamiaceae)	Mem. New York Bot. Gard. 97: 519-541
Pérez-Farrera, MA; Vovides, AP; Iglesias, CG	1999	A new species of Ceratozamia (Zamiaceae, Cycadales) from Chiapas, Mexico	Novon 9(3): 410-413	Ceratozamia alvarezii
Pérez-Farrera, MA; Vovides, AP; Iglesias, CG	2001	The cycad Ceratozamia norstogii D.W. Stev. (Zamiaceae) from southern Mexico: New information on distribution, habitat and vegetative morphology.	Bot. J. Linn. Soc. 137(1): 71-76
Pérez-Farrera, MA; Vovides, AP; Martínez-Camilo, R; Martínez-Melendez, N; Gómez-	2012	Zamia grijalvensis sp. nov. (Zamiaceae, Cycadales) from Chiapas, Mexico with notes on hybridization and karyology	Nordic J. Bot. 30(5): 565-570
Pérez-Farrera, MA; Vovides, AP; Martínez-Camilo, R; Martínez-Melendez, N; Gómez-	2012	Zamia grijalvensissp. nov. (Zamiaceae, Cycadales) from Chiapas, Mexico with notes on hybridization and karyology	Nordic J. Bot. 30(5): 565-570		[Abstract]
Pérez-Farrera, MA; Vovides, AP; Martínez-Camilo, R; Martínez-Melendez, N; Iglesi	2009	A reassessment of the Ceratozamia miqueliana species complex (Zamiaceae) of southeastern Mexico, with comments on species relationships	Syst. Biodivers. 7(4): 433-443	Ceratozamia santillanii protologue
Pérez-Farrera, MA; Vovides, AP; Octavio-Aguilar, P; González-Astorga, J; Cruz-Ro	2006	Demography of the cycad Ceratozamia mirandae (Zamiaceae) under disturbed and undisturbed conditions in a biosphere reserve of Mexico	Plant Ecology 187(1): 97-108		[Abstract]
Perovich, NET	1989	Cuticular ultrastructure in extant and fossil Cycadophytes	Amer. J. Bot. 76(6 sup): 172
Persoon, CH	1807	Cycadea	Synopsis Plantarum: seu Enchiridium botanicum, complectens enumerationem systema 2(2): 630-631
Pócs, T; Luke, Q	2007	A new species of Encephalartos (Zamiaceae) from Tanzania	J. E. Afr. Nat. Hist. 96(2): 193-201	Encephalartos kanga	[Abstract]
Pole, M	2007	Conifer and cycad distribution in the Miocene of southern New Zealand	Austral. J. Bot. 55(2): 143-164		[Abstract]
Prain, D	1916	Diagnoses Africanae: LXVII	Bull. Misc. Inform. Kew 7: 176-182	Encephalartos gratus protologue
Prakash, S; van Staden, J	2006	Sex identification in Encephalartos natalensis (Dyer and Verdoorn) using RAPD markers	Euphytica 152(2): 197-200		[Abstract]
Prakash, SVS, J	2006	Phylogenetic analysis of Encephalartos species (Zamiaceae) Cycadales employing random amplified polymorphic DNA (RAPD) markers	South African J. Botany 72(2): 330-330
Prasad, K; Ramana, MV; Rao, BRP; Sanjappa, M	2015	Cycas andamanica (Cycadaceae): a new species from Andaman Islands, India	Int. J. Innov. Sci. Res. 4(1): 473-476
Prenleloup, LA	1872	Remarques sur quelques Zamias et leurs produits	Bull. Soc. Vaud. Sci. Nat. 11: 277-282
Proches, S; Johnson, SD	2009	Beetle pollination of the fruit-scented cones of the South African cycad Stangeria eriopus	Amer. J. Bot. 96(9): 1722-30		[Abstract]
Rai, AN; Söderbäck, E; Bergman, B	2000	Cyanobacterium-plant symbioses.	New Phytol. 147: 449-481
Ramana, MV; Venu, P; Sanjappa, M	2018	Name confusions in Indian cycads	Current Science 114(2): 269-272		[Abstract]
Ramírez-Restrepo, L; Koi, S; MacGregor-Fors, I	2017	Tales of urban conservation: Eumaeus butterflies and their threatened cycad hostplants	Urban Ecosystems 20(2): 375		[Abstract]
Rani, MSR, C V; Gunasekar, D; A, B; B, Bodo	1998	A bioflavonoid from Cycas beddomei	Phytochemistry 47(2): 3321-33		[Abstract]
Rao, JP; Kumar, MR; Rao, VSR; Kumar, OA; Venkaiah, M	2014	New population of Cycas sphaerica Roxb. (Cycadaceae) discovered in Pinjarikonda Reserve Forest, Andhra Pradesh, India	J. Threat. Taxa 6(6): 5871-5874
Rastogi, S; Ohri, D	2020	Karyotype evolution in cycads	The Nucleus: An International Journal of Cytology and Allied Topics 63(2): 131		[Abstract]
Read, RWS, Marie	1986	Bibliography of the living cycads (annotated)	Lyonia 2(4): 33-200		[Abstract]
Reams, RYJ, E B; Robinson, F R; Sullivan, J M; Casanova, C R; Mas, E	1993	CYCAD (ZAMIA-PUERTORIQUENSIS) TOXICOSIS IN A GROUP OF DAIRY HEIFERS IN PUERTO-RICO	Journal of Veterinary Diagnostic Investigation 5(3): 488-494
Regalado, L; Bouché, CD	1874	Plantae novae a cl. Hildebrandt ex Africa orientali allatae, a. 1874 in horto Berolinensi cultae	Index Seminum Hort. Bot. Berol. 1874 187
Regel, E	1875	Zamia lindeni, Regel	L'Illustration Horticole. Ghent & Brussels 22: 23	Zamia lindenii protologue
Regel, EA	1857	Zwei neue Cycadeen, die im Botanischen Garten zu Petersburg kultivirt werden, nebst Beitragen zur Kenntniss dieser Familie	Bull. Soc. Imp. Naturalistes Moscou 30(1): 163-191
Regel, EA	1863	Cycas riuminiana Porte	Gartenflora 12: 16-17
Regel, EA	1874	Stangeria Katzeri Rgl.	Gartenflora 23
Regel, EA	1875	Descriptiones plantarum novarum et minus cognitarum in regionibus Turkestanicis a Cl. P. et O. Fedschenko, Korolkow, Kuschakewicz et Krause collectis : Cum adnotationibus ad plantas vivas in Horto Imperiali Botanico Petropolitano cultas	Trudy Imp. S.-Peterburgsk. Bot. Sada 3: 97-168
Regel, EA	1875	Encephalartos Verschaffelti Rgl.; die Cycadeen unserer Gärten	Gartenflora 24: 35-43
Regel, EA	1876	Cycadearum generum specierumque revisio	Trudy Imp. S.-Peterburgsk. Bot. Sada 4(4): 275-320
Regel, EA	1876	Lepidozamia denisoni Rgl.	Gartenflora 25: 3-6
Regel, EA von	1876	Die Cycadeen deren Gattungen und Arten	Gartenflora 25: 3-6	Lepidozamia hopei protologue
Rettig, E	1896	Zamia katzeriana Rettig (Ceratozamia Rgl.)	Gartenflora 45: 148-149
Reynolds, LG	1924	Female gametophyte of Microcycas	Bot. Gaz. 77: 391-403
Richardson, PM	1990	Flavonoid chemistry and the taxonomy of cycads.	Mem. New York Bot. Gard. 57: 132-141
Rinaldi, LMR	2005	Evaluation of Different Factors on Regeneration of Plantlets from Embryos of Cycas revoluta Thunb.	HortScience 40(4): 1052
Rinaldi, LMR; Margher, MC; Ena, A	2005	Fertilizer-N effects on Cycas-Nostoc symbiosis.	HortScience 40(4): 1061
Roach, JF; John, C	1993	Cycads in the Adelaide Botanic Garden	Proc. Second Int. Conf. Cycad Biol. : 352-353
Robbertse, H	1995	Leaves on cycad cones	Encephalartos 43: 27-30
Robbertse, PJ; Claassen, I; Schoonraad, E	1988	A note on auxotelic cones and basitonic branching in Encephalartos	S. African J. Bot. 54(4): 394-396
Robbertse, PJ; Vorster, PJ; Van der Westhuizen, S	1988	Encephalartos graniticolus (Zamiaceae): a new species from the north-eastern Transvaal	S. African J. Bot. 54(4): 363-366
Robbertse, PJ; Vorster, PJ; Van der Westhuizen, S	1988	Encephalartos verrucosus (Zamiaceae): a new species from the north-eastern Transvaal	S. African J. Bot. 54(5): 487-490
Robbertse, PJ; Vorster, PJ; Van der Westhuizen, S	1989	Encephalartos middelburgensis (Zamiaceae): a new species from the Transvaal	S. African J. Bot. 55(1): 122-126
Rodigas, É	1886	Cycas bellefonti [bellefontii]	Ill. Hort. 33: 27
Rodkiewicz, B; Bednara, J; Kuras, M; Mostowska, A	1988	Organelles and cell walls of microsporocytes in a cycad Stangeria during meiosis I.	Phytomorphology 38(2-3): 99-110
Rodkiewicz, B; Bednara, J; Mostowska, A; Duda, E; Stobiecka, H	1986	The change in disposition of plastids and mitochondria during microsporogenesis and sporogenesis in some higher plants.	Acta Bot. Neerl. 35(3): 209-216
Roodt, D; Lohaus, R; Sterck, L; Swanepoel, RL; Van de Peer, Y; Mizrachi, E	2017	Evidence for an ancient whole genome duplication in the cycad lineage	PLoS One 12(9): 1-8		[Abstract]
Rose, JN	1909	Studies of Mexican and Central American plants No. 6: a new species of Dioon	Contr. U.S. Natl. Herb. 12(7): 260-261	Dioon purpusii protologue
Rose, JN	1909	Studies of Mexican and Central American plants-No. 6 (Cycadaceae, a new species of Dioon)	Contr. U.S. Natl. Herb. 12(7): 259-261	Dioon purpusii
Rothschild, M	1992	Egg protection by the Atala Hairstreak butterfly (Eumaeus atala florida).	Phytochemistry 31(6): 1959-1960
Rothschild, M; Nash, RJ; Bell, EA	1986	Cycasin in the endangered butterfly Eumaeus atala florida	Phytochemistry 25(8): 1853-1854
Rousseau, P; Vorster, PJ; Afonso, AV; Van Wyk, AE	2015	Taxonomic notes on Encephalartos ferox (Cycadales: Zamiaceae), with the description of a new subspecies from Mozambique	Phytotaxa 204(2): 99-115
Roxburgh, W	1832	Cycas	Fl. Ind. (Roxburgh) 3: 744-749	Cycas sphaerica protologue
Roxburgh, W	1832	Cycas	Fl. Ind. (Roxburgh) 3: 747
Sabato, S	1990	West Indian and South American ccyads.	Mem. New York Bot. Gard. 57: 173-185
Sabato, S; De Luca, P	1985	Evolutionary trends in Dion (Zamiaceae).	Amer. J. Bot. 72(9): 1353-1363
Said Gutierrez-Ortega, J; Yamamoto, T; Vovides, AP; Pérez-Farrera, MA; Martinez,	2018	Aridification as a driver of biodiversity: a case study for the cycad genus Dioon (Zamiaceae)	Ann. Bot. (Oxford) 121(1): 47-60		[Abstract]
Salas-Leiva, DE; Meerow, AW; Calonje, M; Francisco-Ortega, J; Griffith, MP; Naka	2017	Shifting Quaternary migration patterns in the Bahamian archipelago: Evidence from the Zamia pumila complex at the northern limits of the Caribbean island biodive	Amer. J. Bot. 104(5): 757-771		[Abstract]
Salas-Leiva, DE; Meerow, AW; Calonje, M; Griffith, MP; Francisco-Ortega, J; Naka	2013	Phylogeny of the cycads based on multiple single-copy nuclear genes: congruence of concatenated parsimony, likelihood and species tree inference methods	Ann. Bot. (Oxford) 112(7): 1263-78		[Abstract]
Salas-Leiva, DE; Meerow, AW; Francisco-Ortega, J; Calonje, M; Griffith, MP; Stev	2014	Conserved genetic regions across angiosperms as tools to develop single-copy nuclear markers in gymnosperms: an example using cycads	Mol Ecol Resour 14(4): 831-45		[Abstract]
Salas-Morales, SH; Chemnick, J	2012	SERBO and the cycads of Oaxaca, Mexico	Mem. New York Bot. Gard. 106: 36-39
Salas-Morales, SH; Chemnick, J; Gregory, TJ	2016	A new cycad species in the genus Dioon (Zamiaceae) from the Mixteca region of Oaxaca, Mexico	Cact. Succ. J. (Los Angeles) 88(1): 197-204	Dioon planifolium protologue
Salisbury, RA	1796	Prodromus stirpium in horto ad Chapel Allerton Vigentium	Prodr. Stirp. Chap. Allerton : 400
Salzman, S; Crook, D; Crall, JD; Hopkins, R; Pierce, NE	2020	An ancient push-pull pollination mechanism in cycads	Not given 6
Salzman, S; Whitaker, M; Pierce, NE	2018	Cycad-feeding insects share a core gut microbiome	Biological Journal of the Linnean Society 123(4): 728-738		[Abstract]
Sánchez-Tinoco, MY; Engleman, M; Koch, SD	2007	The vascularization of the seed of Ceratozamia mexicana (Zamiaceae)	Mem. New York Bot. Gard. 97: 223-235
Sánchez-Tinoco, MY; Ordóñez-Balderas, JR; Engleman, M	2012	Starch accumulation in the megagametophyte of Ceratozamia mexicana Brongn. and Zamia furfuracea L. f	Mem. New York Bot. Gard. 106: 251-262
Sánchez-Tinoco, MY; Vázquez-Torres, M; Alejandre-Rosas, JA	1993	Determination of sexual dimorphism in a population of C. mexicana Brongn. (Zamiaceae) based on vegetative characteristics	Proc. Second Int. Conf. Cycad Biol. : 131-139
Sanchez-Tinoco, MYE, E M	2004	Seed coat anatomy of Ceratozamia mexicana (cycadales)	Bot. Rev. (Lancaster) 70(1): 24-38		[Abstract]
Saneesh, CS; Varghese, A	2007	Mutualistic relationships involving the endemic Cycas circinalis L.: Field notes from the Appankappu forests, Nilambur, Kerala, India	Cycad Newslett. 30(4): 28-29
Sangduen, NT, M; Hongtrakul, V	2007	Karyomorphological study of some selected cycads.	AU Journal of Technology 11(1): 1-6
Sangduen, NT, M; Hongtrakul, V	2009	Comparative karyomorphological study between male and female plants of some Cycas and Zamia species	Kasetsart Journal 43: 476-485
Sass, C; Little, DP; Stevenson, DW; Specht, CD	2007	DNA barcoding in the cycadales: testing the potential of proposed barcoding markers for species identification of cycads	PLoS One 2(11)		[Abstract]
Saxton, WT	1910	The development of the embryo of Encephalartos	Bot. Gaz. 49: 13-18
Schneider, A	1984	Mutualistic symbiosis of algae and bacteria with Cycas revoluta	Bot. Gaz. 19: 25-32
Schneider, D; Wink, M; Sporer, F; Lounibos, P	2002	Cycads: their evolution, toxins, herbivores and insect pollinators	Naturwissenschaften 89(7): 281-94		[Abstract]
Schneider, EL; Carlquist, S; Chemnick, J	2007	Scanning electron microscope studies of cycad tracheids	South African J. Botany 73(4): 512-517		[Abstract]
Schultes, RE	1958	Plantae austro-americanae X. Americae Australis plantae novae vel. alia ratione sigificantes	Bot. Mus. Leafl. 18(4): 113-272
Schulz, J; Shaw, C A	2006	Cycad toxins, Helicobacter pylori and parkinsonism: Cholesterol glucosides as the common denomenator	Medical Hypotheses 66(6): 1222-1226		[Abstract]
Schuster, J	1932	Cycadaceae	Pflanzenr. (Engler) 99(IV.1): 1-168
Schutzman, B	1984	A new species of Zamia L. (Zamiaceae, Cycadales) from Chiapas, Mexico	Phytologia 55(5): 299-304	Zamia splendens
Schutzman, B	1985	Systematic studies of the Zamia loddigesii/furfuracea complex (Zamiaceae) in Mexico	Amer. J. Bot. 72: 968
Schutzman, B	1987	Mesoamerican cycads	Fairchild Trop. Gard. Bull. 42(3): 16-20
Schutzman, B	1989	A new species of Zamia from Honduras	Syst. Bot. 14(2): 214-219	Zamia standleyi
Schutzman, B	1998	Revisionary studies of Mesoamerican Zamia L. (Zamiaceae, Cycadales);PhD	Not given : 535
Schutzman, B	2003	Distribution of Dioon mejiae and its relatives	Cycad Newslett. 26(1): 6
Schutzman, B	2004	Systematics of Meso-american Zamia (Zamiaceae);;In: Walters TW, Osborne R, editors. Cycad Classification: Concepts and Recommendations. Wallingford, United Kingd	Cycad Classific. Concepts & Recommend. : 159-172
Schutzman, B	2004	The history of Zamia splendens	Cycad Newslett. 27(2): 8-9
Schutzman, B	2005	Least Zamia' - I disagree!	Cycad Newslett. 28(1): 10
Schutzman, B	2005	The history of Zamia fischeri and Z. vazquezii	Cycad Newslett. 28(3-4): 28-29
Schutzman, B	2006	The history of Ceratozamia kuesteriana	Cycad Newslett. 29(2,3): 11
Schutzman, B	2006	The Zamia muricata story	Cycad Newslett. 29(4): 10
Schutzman, B	2011	What has become of Satake-San's Sagos?	Cycad Newslett. 34(2,3): 40-41
Schutzman, B	2013	Zamia elegantissima, the most elegant Zamia - Taxonomic History	Cycad Newslett. 35-36(4,1): 18-21
Schutzman, B; Adams, RS; Haynes, JL; Whitelock, LM	2008	A new endemic Zamia from Honduras (Cycadales: Zamiaceae)	Cycad Newslett. 31(2-3): 22-26	Zamia bussellii
Schutzman, B; Vovides, AP	1985	Phenetic and other systematic studies of the Zamia loddigesii/furfuracea complex.	Amer. J. Bot. 72: 968-969
Schutzman, B; Vovides, AP	1998	A new Zamia (Zamiaceae, Cycadales) from eastern Chiapas, Mexico	Novon 8(4): 441-446	Zamia lacandona
Schutzman, B; Vovides, AP; Adams, RS	1998	A new Zamia (Zamiaceae, Cycadales) from central Panama	Phytologia 85(3): 137-145	Zamia elegantissima (invalid description)
Schutzman, B; Vovides, AP; Adams, RS	2003	Validation of the name Zamia elegantissima Schutzman, Vovides, & Adams	Phytologia 85(6): 389
Schutzman, Vovides & Dehgan	1988	Two new species of Zamia (Zamiaceae, Cycadales) from Southern Mexico	Bot. Gaz. 149(3): 347-360	Zamia soconuscensis & Zamia cremnophila
Schweinfurth, G	1871	Bericht über die botanischen Ergebnisse der ersten Niam-Niam Reise	Bot. Zeitung (Berlin) 29: 324-341	Encephalartos septentrionalis protologue
Seawright, A; Brown, AW; Nolan, CC; Cavanagh, JB	1993	Cycad toxicity in domestic animals - what agent is responsible	Proc. Second Int. Conf. Cycad Biol. : 61-70
Seawright, A; Nolan, CC; Cavanagh, JB	1992	A Cycad neurotoxin	Toxins & Targets, Effects Natural & Synthetic Poisons On Living Cells & Fragile : 81-86		[Abstract]
Sedgewick, PJ	1924	Life history of Encephalartos	Bot. Gaz. 77: 300-310
Seeman, BC	1854	Cycadeae. Flora of the isthmus of Panama	Bot. Voy. Herald 6: 201-203
Segalla, R; Calonje, M	2019	Zamia brasiliensis, a new species of Zamia (Zamiaceae, Cycadales) from Mato Grosso and Rondônia, Brazil	Phytotaxa 404(1): 11		[Abstract]
Senior, D; Buergelt, C D	1985	Cycad intoxication in the dog	J. American Animal Hospital Asoc. 21: 103-109
Shapiro, S	1949	The presence of stomata on the nucellus of Zamia floridana	Amer. J. Bot. 36: 803
Shapiro, S	1954	Stomata on the ovules of Zamia floridana	Amer. J. Bot. 38: 47-53
Shaw, CA; Wilson, JMB; Cruz-Aguado, R; Singh, S; Hawkes, EL; Lee, V; Marler, TE	2007	Cycad-induced neurodegeneration in a mouse model of ALS-PDC: is the culprit really BMAA, or is a novel toxin to blame?	Mem. New York Bot. Gard. 97: 286-307
Shen, C-F; Hill, KD; Tsou, C-H; Chen, C-J	1994	Cycas taitungensis C.F. Shen, K.D. Hill, C.H. Tsou & C.J. Chen, sp. nov. (Cycadaceae), a new name for the widely known cycad species endemic in Taiwan.	Bot. Bull. Acad. Sin. 35(2): 133-140	Cycas taitungensis protologue
Sifton, HB	1915	On the occurrence and significance of 'bars' or 'rims' of Sanio in the cycads.	Bot. Gaz. 60: 400-405
Sifton, HB	1920	Some characters of xylem tissue in cycads.	Bot. Gaz. 70: 425-435
Simons, P	1993	Why Cycad sex is hot and sticky	New Scientist 138: 16		[Abstract]
Sims, J	1815	Zamia pygmaea. Least Zamia	Bot. Mag. 42: 1741
Sims, J	1815	Zamia pygmaea. Least Zamia.	Bot. Mag. 41: 1741	Zamia pygmaea protologue
Singh, LJ	2017	Cycas dharmrajiisp. nov. (Cyadaceae) from Andaman and Nicobar Islands, India	Nordic J. Bot. 35(1): 69-76		[Abstract]
Singh, R	1997	On the occurrence of lenticels in seeds of Cycas L	Phytomorphology : 325-331		[Abstract]
Singh, R; Radha, P	2006	A new species of Cycas from the Malabar Coast, Western Ghats, India	Brittonia 58(2): 119-123	Cycas annaikalensis
Singh, R; Radha, P	2008	A new species of Cycas (Cycadaceae) from Karnataka, India	Bot. J. Linn. Soc. 158(3): 430-435	Cycas swamyi
Singh, R; Radha, P; Khuraijam, JS	2015	A new species, a new combination and a new subsection of Cycas from Odisha, northern Eastern Ghats of India	Asian J. Conserv. Biol. 4(1): 3-14	Cycas nayagarhensis and C. orixensis protologues
Singh, R; Radha, P; Sharma, P	2007	Cycas annaikalensis from the Western Ghats of India with a discussion of the specific limits of Cycas circinalis L.	Mem. New York Bot. Gard. 97: 542-556
Siniscalco Gigliano, G; Cozzolino, S; Aceto, S; Gaudio, L	1996	Effects of Encephalartos altensteinii Lehm. extracts and methylazoxymethanol (MAM) on erythroid commitment in mouse erythroleukemia (MEL) cells.	S. African J. Bot. 92(4): 185-188
Siniscalco Gigliano, G; De Luca, P; Caputo, P; Moretti, A; Cozzolino, S; Gaudio,	1993	The phylogeny of some cycad genera: a molecular approach	Proc. Second Int. Conf. Cycad Biol. : 248-249
Siniscalco Gigliano, G; Muoio, R	1994	A chemotaxonomic study of mucilages in American Zamiaceae	Giornale Botanico Italia 128(5): 851-860		[Abstract]
Skubatz, H; Meeuse, B J D	1993	Oscillatory heat-productin in the male cone of Cycads	J. Exp. Bot. 44(259): 489-492		[Abstract]
Slabbert, R; Hurter, PJH	1993	Focus on Encephalartos cupidus	Encephalartos 36: 5-10
Slabbert, R; Hurter, PJH	1994	Focus on Encephalartos sclavoi	Encephalartos 37: 4-8
Small, JK	1921	Seminole bread - the conti, a history of the genus Zamia in Florida	J. New York Bot. Gard. 22: 121-137
Small, JK	1926	Cycads	J. New York Bot. Gard. 17(318)-129	Protologue description(s): Zamia silvicola
Small, JK	1926	Cycads	J. New York Bot. Gard. 27(318): 121-129
Smith, FG	1904	The nutrition of the egg in Zamia	Bot. Gaz. 37: 346-352
Smith, FG	1907	Morphology of the trunk and development of the microsporangium of cycads	Bot. Gaz. 43: 187-204
Smith, FG	1910	Development of the ovulate strobilus and young ovule of Zamia floridana	Bot. Gaz. 5: 128-141
Smith, FG	1929	Multiple cones in Zamia floridana.	Bot. Gaz. 88: 204-217
Smith, GS	1978	N and K fertilization of Florida coontie, Zamia integrifolia Ait	HortScience 13(4): 438-439
Smith, GS	1978	Seed scarification to speed germination of ornamental cycads (Zamia spp.).	HortScience 13(4): 436-438
Smoot, EL; Taylor, TN; Delevoryas, T	1985	Structurally preserved fossil plants from Antarctica. I. Antarcticycas, new genus. A Triassic cycad stem from the Beardmore Glacier area.	Amer. J. Bot. 72(9): 1410-1423
Sparkman, G	2014	Growing Encephalartos princeps in Southern California	Cycad Newslett. 37(1): 5-7
Spencer, PS	1993	Neurotoxic properties of cycads - an occupational hazard for botanists	Proc. Second Int. Conf. Cycad Biol. : 71-74
Spencer, PS; Nunn, PB; Hugon, J; Lundolph, AC; Ross, SM; Roy, DN; Robertson, RC	1987	Guam amyotrophic lateral sclerosis-parkinsonianism-dementia linked to a plant exictant neurotoxin	Science 237: 517-522		[Abstract]
Spendlove, E	1990	Bill Branson's petrified Cycads	Rock & Gem 20(12): 76-80
Spratt, ER	1911	Some observations on the life-history of Anabaena cycadeae	Ann. Bot. (Oxford) 25(2): 369-380
Spratt, ER	1915	The root nodules of the Cycadaceae	Ann. Bot. (Oxford) 29(4): 618-626
Srivastava, PC; Chauhan, DK	2004	A strange branching cycad: Cycas circinalis var. swamyii Pant	Cycad Newslett. 27(1): 5-7
Srivastava, RC	2014	A new species of Cycas from India	Indian J. Pl. Sci. [Jaipur] 3(1): 109-110
Srivastava, RC	2014	A new species of Cycas from India	Indian J. Pl. Sci. [Jaipur] 3(1): 109-110	Cycas sainathii
Srivastava, RC	2014	Notes on green diamonds of AJC Bose Indian botanic garden Howrah	Indian J. Pl. Sci. [Jaipur] 3(2): 151-153
Srivastava, RC; Singh, LJ	2015	A new species of Indian Cycas	Int. J. Curr. Res. Biosci. Plant Biol. 2(8): 35-37
Staff, IA; Ahern, CP	1993	Symbiosis in cycads with special reference to Macrozamia communis	Proc. Second Int. Conf. Cycad Biol. : 200-210
Standley, PC	1924	New species of plants from Salvador. III	J. Wash. Acad. Sci. 14(4): 93-99	Protologue(s): Zamia herrerae
Standley, PC; Williams, LO	1950	Dioon mejiae, a new cycad from Honduras	Ceiba 1(1): 36-38
Stapf, O; Burtt-Davy, J	1926	Encephalartos laevifolius	Man. Pl. Transvaal [Burtt Davy] 1: 97-99	Encephalartos laevifolius protologue
Stapf, O; Burtt-Davy, J	1926	Encephalartos lanatus	Man. Pl. Transvaal [Burtt Davy] 1: 40	Encephalartos lanatus protologue
Sternberg, P	2011	Encephalartos lehmanii in the Wild	Cycad Newslett. 34(4): 11-15
Stevenson, DW	1980	Observations on root and stem contractions in cycads (Cycadales) with special reference to Zamia pumila L	Bot. J. Linn. Soc. 81(4): 275-281
Stevenson, DW	1980	Radial growth in the Cycadales	Amer. J. Bot. 67(4): 465-475
Stevenson, DW	1981	Observations on ptyxis, phenology and trichomes in the Cycadales and their systematic implications.	Amer. J. Bot. 68(8): 1104-1114
Stevenson, DW	1982	A new species of Ceratozamia (Zamiaceae) from Chiapas, Mexico	Brittonia 34(2): 181-184	Ceratozamia norstogii
Stevenson, DW	1985	A proposed classification of the Cycadales	Amer. J. Bot. 72: 971-972
Stevenson, DW	1985	Distribution and systematics of Ceratozamia (Zamiaceae).	Amer. J. Bot. 72: 972
Stevenson, DW	1987	Again the West Indian zamias	Fairchild Trop. Gard. Bull. 42(3): 23-27
Stevenson, DW	1990	Morphology and systematics of the Cycadales	Mem. New York Bot. Gard. 57: 8-55
Stevenson, DW	1992	A formal classification of the extant cycads	Brittonia 44(4): 220-223
Stevenson, DW	1993	The Zamiaceae in Panama with comments on phytogeography and species relationships	Brittonia 45(1): 1-16
Stevenson, DW	2001	Orden Cycadales	Fl. Colombia (1983+) 21: 1-91
Stevenson, DW	2004	Cycads of Colombia	Bot. Rev. (Lancaster) 70(2): 194-234
Stevenson, DW	2004	Zamiaceae of Bolivia, Ecuador, and Peru	Cycad Classific. Concepts & Recommend. : 173-194
Stevenson, DW	2005	Zamiaceae	Fl. Venez. Guayana 9: 575-576
Stevenson, DW	2020	Observations on vegetative branching in cycads	International Journal of Plant Sciences
Stevenson, DW; Artabe, AE	1995	Fossil and extant cycads: a cladistic analysis.	Amer. J. Bot. 82(6 suppl.): 82-83
Stevenson, DW; Calonje, M; Stanberg, L	2019	The World List of Cycads	Mem. New York Bot. Gard. 117: 540-576
Stevenson, DW; Cárdenas López, D; Castaño, N	2018	A new Zamia (Zamiaceae) from Colombia	Brittonia 70: 364-368		[Abstract]
Stevenson, DW; Fawcet, PKS	1998	Pollination biology of cycads	Reproductive Biology : 277-294
Stevenson, DW; Hill, W	1995	The World list of cycads	Proc. Third Int. Conf. Cycad Biol. : 55-64
Stevenson, DW; Moretti, A; De Luca, P	1990	A new species of Encephalartos (Zamiaceae) from Tanzania	Mem. New York Bot. Gard. 57: 156-161	Encephalartos sclavoi
Stevenson, DW; Moretti, A; Gaudio, L	1998	A new species of Zamia (Zamiaceae) from Belize and the Yucatan Peninsula of Mexico	Delpinoa 37-38: 3-8	Zamia polymorpha
Stevenson, DW; Norstog, K; Molsen, DV	1996	Midribs of cycad pinnae	Brittonia 48(1): 67-74
Stevenson, DW; Osborne, R	1993	The world list of cycads	Proc. Second Int. Conf. Cycad Biol. : 354-364
Stevenson, DW; Osborne, R; Hendricks, JG	1990	A world list of cycads	Mem. New York Bot. Gard. 57: 200-208
Stevenson, DW; Sabato, S	1986	Typification of names in Ceratozamia brongn, Dion lindl, and Microcycas A. DC. (Zamiaceae)	Taxon 35(3): 578-584
Stevenson, DW; Sabato, S	1986	Typification of names in Zamia L. and Aulacophyllum Regel (Zamiaceae)	Taxon 35(3): 134-144
Stevenson, DW; Sabato, S; Moretti, A; De Luca, P	1998	What is Zamia fischeri Miquel?	Delpinoa 37-38: 9-17
Stevenson, DW; Sabato, S; Vázquez-Torres, M	1986	A new species of Ceratozamia (Zamiaceae) from Veracruz, Mexico with comments on species relationships, habitats, and vegetative morphology in Ceratozamia	Brittonia 38(1): 17-26	Ceratozamia euryphyllidia
Stevenson, DW; Vovides, AP; Chemnick, J	2003	Regional overview: New World	Cycads: Status, Survey, and Conservation Action Plan : 31-38
Stewart, W	1993	Cycads: origins and relationships	Paleobotany and the evolution of plants : 338-349
Stopes, MC	1905	On the double nature of the cycadean integument	Ann. Bot. (Oxford) 19(4): 561-566
Stopes, MC	1910	Adventitious budding and branching in Cycas.	New Phytol. 9(6-7): 235-241
Storey, SB	1969	Somatic reduction in cycads	Science 164
Stuchlick, L; Moncada, M	1983	Pollen morphology of Cuban Gymnosperm species	Acta Bot. Hung. 29(1-4): 75-90
Suárez-Moo, PdJ; Vovides, AP; Griffith, MP; Barona-Gómez, F; Cibrián-Jaramillo,	2019	Unlocking a high bacterial diversity in the coralloid root microbiome from the cycad genus Dioon	PLoS One 14(2): 1-20		[Abstract]
Suinyuy, TN; Donaldson, J; Johnson, SD	2009	Insect pollination in the African cycad Encephalartos friderici-guilielmi Lehm	South African J. Botany 75(4): 682-688		[Abstract]
Suinyuy, TN; Donaldson, J; Johnson, SD; Bösenberg, D	2012	Role of cycad cone volatile emissions and thermogenesis in the pollination of Encephalartos villosus Lem.: Preliminary findings from studies of plant traits and insect responses	Mem. New York Bot. Gard. 106: 318-334
Swart, C; Rowswell, R; Donaldson, J; Barker, N	2019	Population structure and survival of the critically endangered cycad Encephalartos latifrons in South Africa	South African J. Botany 127: 80-90		[Abstract]
Tadera, K; Gin'ya, H; Sawada, R; Motani, Y; Aikawa, Y; Nozaki, A; Yagi, F; Minam	1995	Cycasin formation in tissue cultures of Japanese cycad	Phytochemistry 38(5): 1199-1201
Tadera, K; Yagi, F; Arima, M; Kobayashi, A	1985	Formation of cycasin from methylazoxymethanol by UDP-glucosyltransferase from leaves of Japanese cycad	Agric. Biol. Chem. 49(9): 2827-2828
Tadera, K; Yagi, F; Minemoto, S; Kobayashi, A	1982	Inhibitory effects of cycasin on germination, growth and alpha-amylase biosynthesis in rice plants (Oryza sativa cv. Ariake)	Agric. Biol. Chem. 46(6): 1453-1456
Tagashira, NK, K	1999	A karyotype comparison of nine species of aneuploid Zamia by using the conventional orcein staining and the fluorochrome CMA DAPI differential staining methods	Cytologia Tokyo 64(4): 449-458		[Abstract]
Tagashira, NK, K	2001	Chromosome phylogeny of Zamia and Ceratozamia by means of Robertsonian changes detected by fluorescence in situ hybridization (FISH) technique of rDNA	Pl. Syst. Evol. 227(3-4): 145-155		[Abstract]
Takaso, T; Kimoto, Y	2011	Development of macrosporophylls in Cycas revoluta	Cycad Newslett. 34(2,3): 46
Tam, NM	2006	Conservation of Genetic Diversity of Threatened Cycads (Cycadaceae) in Vietnam	Advances in Natural Sciences 7(1-2): 121-129		[Abstract]
Tam, NM; Ha Giang, V T	2006	Effects of Habitat Fragmentation on Genetic Diversity in Cycas balansae (Cycadaceae)	AJSTD 23(3): 193-205		[Abstract]
Tang, W	1985	Cycad trade and conservation	Encephalartos 4: 22-23
Tang, W	1986	Collecting and storing cycad pollen	Encephalartos 7: 4-6
Tang, W	1987	Heat and odor production in cycad cones	Fairchild Trop. Gard. Bull. 42(3): 12-14
Tang, W	1987	Heat production in cycad cones	Bot. Gaz. 148(2): 165-174
Tang, W	1987	Insect pollination in the cycad Zamia pumila (Zamiaceae).	Amer. J. Bot. 74(1): 90-99
Tang, W	1990	Reproduction in the cycad Zamia pumila in a fire-climax habitat: an eight-year study	Bull. Torrey Bot. Club 117(4): 368-374
Tang, W	1990	The tropical rain forest cycads	Fairchild Trop. Gard. Bull. 45(2): 7-11
Tang, W	1993	Heat and odour production in cycad cones and their role in insect pollination	Proc. Second Int. Conf. Cycad Biol. : 140-147
Tang, W	1993	Seed dispersal and reproductive effort in Zamia pumila	Proc. Second Int. Conf. Cycad Biol. : 148-158
Tang, W	1997	Focus on Dioon spinulosum	Encephalartos 50: 4-11
Tang, W	1998	Focus on Cycas hainanensis	Encephalartos 54: 4-10
Tang, W	1999	Focus on Cycas tansachana	Encephalartos 60: 4-7
Tang, W	2001	Focus on Cycas clivicola subsp. clivicola	Encephalartos 67: 8-13
Tang, W	2002	Two new pests of Zamia in Florida	Encephalartos
Tang, W	2003	Focus on Cycas lindstromii	Encephalartos 76: 8-12
Tang, W	2004	Focus on Cycas pranburiensis	Encephalartos 80: 15-22
Tang, W	2006	Cycas debaoensis: 'The Shangri-La Cycad'	Cycad Newslett. 29(1): 10-11
Tang, W	2011	Cycas revoluta - an Asian perspective	Cycad Newslett. 34(2,3): 38-39
Tang, W; Lindström, AJ	2006	Focus on Zamia amazonum	Encephalartos 86: 12-19
Tang, W; O'Brien, CW	2012	Distribution and evolutionary patterns of the cycad weevil genus Rhopalotria (Coleoptera: Curculionoidea: Belidae) with emphasis on the fauna of Panama	Mem. New York Bot. Gard. 106: 335-351
Tang, W; Sternberg, L; Price, D	1987	Metabolic aspects of thermogenesis in male cone of five cycad species.	Amer. J. Bot. 74(10): 1555-1559
Tang, W; Xu, G; O'Brien, CW; Calonje, M; Franz, NM; Johnston, MA; Taylor, A; Vov	2018	Molecular and Morphological Phylogenetic Analyses of New World Cycad Beetles: What They Reveal about Cycad Evolution in the New World	Diversity 10(2): 38
Tang, W; Yang, SL	1995	Focus on Cycas siamensis	Encephalartos 43: 4-11
Taylor B, AS; Haynes, JL; Stevenson, DW; Holzman, G; Mendieta, J	2012	Biogeographic Insights in Central American Cycad Biology	Global Advances in Biogeography : 73-98
Taylor Blake, AS; Holzman, G	2012	A New Zamia Species from the Panama Canal Area	Bot. Rev. (Lancaster) 78(4): 335-344
Taylor, AS	2011	Keeping Cycas revoluta CAS-free in Panama	Cycad Newslett. 34(2,3): 35
Taylor, AS	2012	Notes on the ethnobotany of Panamanian cycads	Mem. New York Bot. Gard. 106: 165-177
Taylor, AS; Haynes, JL; Holzman, G	2008	Taxonomical, nomenclatural and biogeographical revelations in the Zamia skinneri complex of Central America (Cycadales: Zamiaceae)	Bot. J. Linn. Soc. 158(3): 399-429
Taylor, AS; Haynes, JL; Holzman, G	2012	The Zamia skinneri (Cycadales: Zamiaceae) complex in Panama	Mem. New York Bot. Gard. 106: 518-532
Taylor, AS; Haynes, JL; Holzman, G; Mendieta, J	2007	Variability of natural populations and conservation issues facing plicate-leaved Zamia species in Central and Western Panama	Mem. New York Bot. Gard. 97: 557-577
Taylor, AS; Holzman, G	2012	A new Zamia species from the Panama Canal area	Bot. Rev. (Lancaster) 78(4): 335-344	Zamia stevensonii
Taylor, AS; Holzman, G; Calonje, M; Espinosa Miranda, C	2013	Zamia lindleyi Warsz. Ex A. Dietr., A Western Highland Endemic of the Isthmus of Panama	Cycad Newslett. 36(4): 6-13
Taylor, TN	1969	Cycads: evidence from the upper pennsylvanian	Science 164(3877): 294-5		[Abstract]
Taylor, TN; Taylor, EL	1987	Structurally preserved fossil plants from Antarctica. III. Permian seeds.	Amer. J. Bot. 74(6): 904-913
Teas, HJ; Sax, HJ; Sax, K	1965	Cycasin: radiometric effect.	Science 149
Terence, NS; John, SD; Steven, DJ	2015	Geographical matching of volatile signals and pollinator olfactory responses in a cycad brood-site mutualism	Proceedings: Biological Sciences 282(1816): 1		[Abstract]
Terrazas, T	1991	Origin and activity of successive cambia in Cycas (Cycadales).	Amer. J. Bot. 78(10): 1335-1344
Terry, I	2001	Thrips and weevils as dual, specialist pollinators of the Australian cycad Macrozamia communis (Zamiaceae)	Int. J. Pl. Sci. 162(6): 1293-1305
Terry, I; Tang, W; Marler, TE	2012	Pollination systems of island cycads: Predictions based on island biogeography	Mem. New York Bot. Gard. 106: 102-132
Terry, I; Tang, W; Marler, TE	2012	Pollination Systems of Island Cycads: Predictions Based on Island Biogeography	Mem. New York Bot. Gard. 106: 102-132
Terry, I; Tang, W; Taylor, AS; Donaldson, J; Singh, R; Vovides, AP; Cibrián-Jara	2012	An Overview of Cycad Pollination Studies	Mem. New York Bot. Gard. 106: 352-394
Terry, I; Walter, G H; Forster, P I; Roemer, R B; Donaldson, J; Machin, P J	2004	Association of cone thermogenesis and volatiles with pollinator specificity in Macrozamia cycads	Pl. Syst. Evol. 243(3-4): 233-247		[Abstract]
Terry, I; Walter, G; Hull, C; Roemer, R	2007	Macrozamia cycad cone traits mediate thrips and weevil pollinator behavior	Journal of Insect Science 7
Terry, I; Walter, GH; Donaldson, J; Snow, E; Forster, PI; Machin, PJ	2005	Pollination of Australian Macrozamia cycads (Zamiaceae): effectiveness and behavior of specialist vectors in a dependent mutualism	Amer. J. Bot. 92: 931-940		[Abstract]
Terry, I; Walter, GH; Hull, C; Moore, C	2007	Responses of pollinating thrips and weevils to specific Macrozamia cycad cone volatiles	Mem. New York Bot. Gard. 97: 346-371
Terry, I; Walter, GH; Moore, C; Roemer, R; Hull, C	2007	Odor-mediated push-pull pollination in cycads	Science 318(5847): 70		[Abstract]
Thiesson, R	1908	The vascular anatomy of the seedling of Dioon edule	Bot. Gaz. 46: 357-380
Thiselton-Dyer, WT	1882	New Garden Plants: Zamia montana	Gard. Chron., n.s. 17: 460
Thiselton-Dyer, WT	1883	On a new species of Cycas from Southern India	Trans. Linn. Soc. London, Bot. 2(5): 85-86	Cycas beddomei
Thiselton-Dyer, WT	1884	Cycadaceae	Biol. Cent.-Amer., Bot. 3: 190-195
Thiselton-Dyer, WT	1905	New or noteworthy plants. Cycas micholitzii, Dyer	Gard. Chron. ser. 3 38(973): 142-144
Thomas Edward, M; Gil Naputi, C	2017	Adventitious rooting of mature Cycas micronesica K.D. Hill (Cycadales: Cycadaceae) tree stems reveals moderate success for salvage of an endangered cycad	J. Threat. Taxa 9(8)		[Abstract]
Thomas, EM; Frankie, CM; Terry, LI	2020	Burrowing activity of coconut rhinoceros beetle on Guam cycads	Communicative & Integrative Biology 13(1): 74-83
Thunberg, CP	1775	Cycas caffra, nova palmae species descripta	Nova Acta Regiae Soc. Sci. Upsal. 2: 285-290
Thunberg, CP	1782	Beschryryving van twee nieuwe soorten van palmboomachtige gewassen, uit Japan en van de Kaap der Goede Hoope; met eenige aanmerkingen omtrent de bloemen van de varens en dergelyke planter	Verh. Holl. Maatsch Weetensch. Haarlem 20(2): 424-427	Cycas revoluta protologue
Thunberg, CP	1800	Zamia caffra	Prodr. Pl. Cap. 2
Tomlinson, PB; Magellan, TM; Griffith, MP	2014	Root contraction in Cycas and Zamia (Cycadales) determined by gelatinous fibers	Amer. J. Bot. 101(8): 1275-85		[Abstract]
Tomlinson, PB; Ricciardi, A; Huggett, BA	2018	Cracking the omega code: hydraulic architecture of the cycad leaf axis	Ann. Bot. (Oxford) 121(3): 483-488		[Abstract]
Treutlein, J; Wink, M	2002	Molecular phylogeny of cycads inferred from rbcL sequences	Naturwissenschaften 89(5): 221-5		[Abstract]
Turner, I	1993	In search of Cycas micholitzii	Proc. Second Int. Conf. Cycad Biol. : 290-293
Turner, I; Sclavo, JP; Malaisse, F	2006	Un nouvel Encephalartos Lehm. (Zamiaceae) de Zambie	Biotechnol. Agron. Soc. Environm. 10(3): 181-183	Protologue description(s): Encephalartos flavistrobilus
Udden, JA	1908	A Cycad from the Upper Cretaceous in Maverick County, Texas	Science 28(709): 159-60
Urban, I	1899	Species novae, praesertim portoricensis. Cycadaceae.	Symb. Antill. 12: 9
Vagnoli, L; Margheri, MC; Allota, A; Materassi, R	1992	Morphological and physiological properties of symbiotic cyanobacteria	New Phytol. (2): 243-249
Vakrameyev, VL; Sodov, Z	1986	A Cycad Guramsania gen nov from the Upper Permian of South Mongolia	Paleontological J. 20(3): 95-101
Valencia-Montoya, WA; Tuberquia, D; Guzmán, PA; Cardona-Duque, J	2017	Pollination of the cycad Zamia incognita A. Lindstr. & Idárraga by Pharaxonotha beetles in the Magdalena Medio Valley, Colombia: a mutualism dependent on a speci	Arthropod-Plant Interactions: An international journal devoted to studies on int 11(5): 717		[Abstract]
Van Buskirk, M	2008	Growing Encephalartos horridus and E. lehmannii in South Texas	Cycad Newslett. 31(1): 10
van der Bank, FH; Vorster, PJ; Van Buskirk, M	1998	Phylogenetic relationships, based on allozyme data, between six cycad taxa indigenous to South Africa.	S. African J. Bot. 64(3): 182-188
van Deventer, G	2014	Visiting Encephalartos princeps in habitat	Cycad Newslett. 37(1): 8-9
Van Houtte, L	1845	Zamia fischeri	Hort. Vanhoutt. 1(1): 20
Van Konijnenburg-van Cittert, JHA; Pott, C; Schmeißner, S; Dütsch, G; Kustatsche	2018	Seed ferns and cycads in the Rhaetian flora of Wüstenwelsberg, Bavaria, Germany	Review Palaeobotany & Palynology 258: 190-214		[Abstract]
van Staden, J	1978	A comparison of the endogenous cytokinins in the leaves of four gymnosperms	Bot. Gaz. 139(1): 32-35
Vandervort, D	2012	In Search of the 'Giant Spinulosae'	Cycad Newslett. 35(2): 12
Vannini, JP	2007	Notes on the Guatemalan cycad Zamia tuerckheimii Donn. Sm.	Cycad Newslett. 30(3): 4-7
Vargas Amado, G; Pérez de la Rosa, JA; Torres Morán, JP; Reyes Velázquez, WP	2007	Morphological variation of Dioon (Zamiaceae) from the Pacific slope of Mexico using a multivariate analysis	Mem. New York Bot. Gard. 97: 578-596
Varghese, A; Krishnamurthy, V; Ticktin, T	2012	Harvest, use, and ecology of Cycas circinalis L. A case study in the Nilgiri Biosphere Reserve area, Western Ghats, India	Mem. New York Bot. Gard. 106: 178-191
Vázquez-Torres, M	1990	Algunos datos etnobotanicos de las cicadas en Mexico	Mem. New York Bot. Gard. 57: 144-147
Vázquez-Torres, M; Moretti, A; Carvajal-Hernández, C	2008	A new species of Ceratozamia from Veracruz, Mexico	Delpinoa 50-51: 129-133	Ceratozamia delucana
Vázquez-Torres, M; Vovides, AP	1998	A new species of Ceratozamia (Zamiaceae) from Veracruz, Mexico	Novon 8(1): 87-90	Ceratozamia morettii
Vega, A; Bell, EA	1967	a-Amino-b-methylaminopropionic acid, a new amino acid from seeds of Cycas circinalis	Phytochemistry 6(5): 759-760		[Abstract]
Velardi, T	2011	Sotetsu - Cycas revoluta in Japan	Cycad Newslett. 34(2,3): 32-34
Verdoorn, IC	1945	A new species of Encephalartos from the Waterburg	J. S. African Bot. 11(1): 1-4	Encephalartos eugene-maraisii
Verdoorn, IC	1949	Encephalartos lebomboensis	Fl. Pl. Africa 27: 1078-1079	Encephalartos lebomboensis protologue
Verdoorn, IC	1949	Encephalartos ngoyanus	Fl. Pl. Africa 27
Verdoorn, IC	1951	Cycadaceae	Bothalia 6(1): 220-221	Encephalartos humilis protologue
Verdoorn, IC	1954	Encephalartos eximius	Bothalia 6(2): 426-427
Viljoen, CD; van Staden, J	2006	The genetic relationship between Encephalartos natalensis and E. woodii determined using RAPD fingerprinting	S. African J. Bot. 72(4): 642-645
Vorster, E	1993	Taxonomy of Encehalartos (Zamiaceae): taxonomically useful external characteristics	Proc. Second Int. Conf. Cycad Biol. : 294-299
Vorster, PJ	1988	Growing Encephalartos in a Miami-type climate	Fairchild Trop. Gard. Bull. 43(2): 17-26
Vorster, PJ	1990	Encephalartos aemulans (Zamiaceae), a new species from northern Natal	S. African J. Bot. 56(2): 239-243
Vorster, PJ	1991	Focus on Encephalartos aemulans	Encephalartos 28: 4-8
Vorster, PJ	1992	Focus on Encephalartos dolomiticus	Encephalartos 30: 3-7
Vorster, PJ	1992	Focus on Encephalartos dyerianus	Encephalartos 29: 3-7
Vorster, PJ	1996	Encephalartos apIanatus (Zamiaceae): a new species from Swaziland	S. African J. Bot. 62(1): 57-60
Vorster, PJ	1996	Encephalartos brevifoliolatus (Zamiaceae): a new species from the Northern Province	S. African J. Bot. 62(1): 61-64
Vorster, PJ	1996	Encephalartos msinganus (Zamiaceae): a new species from KwaZulu-Natal	S. African J. Bot. 62(2): 67-70
Vorster, PJ	1996	Encephalartos senticosus (Zamiaceae): a new species from northern K waZulu-Natal and Swaziland	S. African J. Bot. 62(2): 76-79
Vorster, PJ	1996	Encephalartos venetus (Zamiaceae): a new species from the Northern Province	S. African J. Bot. 62(2): 71-75
Vorster, PJ	1996	Focus on Encephalartos aplanatus	Encephalartos 46: 4-8
Vorster, PJ	1996	Focus on Encephalartos brevifoliolatus	Encephalartos 47: 4-7
Vorster, PJ	1997	Focus on Encephalartos msinganus	Encephalartos 51: 4-9
Vorster, PJ	1998	Encephalartos ituriensis (Zamiaceae): An emended description	Adansonia 20(1)		[Abstract]
Vorster, PJ	2004	Typification of Encephalartos	Bothalia 34(2): 112-113
Vorster, PJ	2007	Subdivision of Encephalartos	Mem. New York Bot. Gard. 97: 597-610
Vorster, PJ; Heibloem, P	1995	Encephalartos imbricans (Zamiaceae): a new species from Uganda	Novon 5(4): 388-394
Vorster, PJ; Heibloem, P	1995	Encephalartos successibus (Zamiaceae): a new species from Uganda	S. African J. Bot. 61(6): 347-351
Vorster, PJ; van der Bank, HJ; van der Bank, M; Wink, M	2004	Phylogeny of Encephalartos: some Eastern Cape species.	Bot. Rev. (Lancaster) 70(2): 250-259
Vorster, PJ; Vorster, E	1985	Focus on Stangeria eriopus	Encephalartos 2: 8-17
Vorster, PJ; Vorster, E	1986	Focus on Cycas thouarsii	Encephalartos 6: 3-10
Vovides, AP	1983	Systematic studies on the Mexican Zamiaceae. I. Chromosome numbers and karyotypes	Amer. J. Bot. 70(7): 1002-1006
Vovides, AP	1985	Systematic studies on the Mexican Zamiaceae. II. Additional notes on Ceratozamia kuesteriana from Tamaulipas, Mexico	Brittonia 37(2): 226-231
Vovides, AP	1990	Spatial distribution, survival and fecundity of Dioon edule (Zamiaceae) in a tropical deciduous forest in Veracruz, Mexico, with notes on its habitat	Amer. J. Bot. 77(12): 1532-1543
Vovides, AP	1993	Cycad conservation in Mexico: Dioon edule Lindl. - A study case	Proc. Second Int. Conf. Cycad Biol. : 365-369
Vovides, AP; Avendaño, S; Pérez-Farrera, MA; González-Astorga, J	2008	A new species of Ceratozamia (Cycadales, Zamiaceae) from Veracruz, Mexico	Novon 18(1): 109-114	Ceratozamia decumbens
Vovides, AP; Avendaño, S; Pérez-Farrera, MA; Stevenson, DW	2012	What is Ceratozamia brevifrons (Zamiaceae)?	Brittonia 64(1): 35-42		[Abstract]
Vovides, AP; Clugston, JAR; Gutiérrez-Ortega, JS; Pérez-Farrera, MA; Sánchez-Tin	2018	Epidermal morphology and leaflet anatomy of Dioon (Zamiaceae) with comments on climate and environment	Flora 239: 20-44		[Abstract]
Vovides, AP; Galicia, S	2016	G-fibers and Florin ring-like structures in Dioon (Zamiaceae)	Bot. Sci. 94: 263-268
Vovides, AP; Gónzalez, D; Pérez-Farrera, MA; Avendaño, S; Bárcenas, C	2004	A review of research on the cycad genus Ceratozamia Brongn. (Zamiaceae) in Mexico	Taxon 53(2): 291-297
Vovides, AP; González-Astorga, J; Pérez-Farrera, MA; González, D; Bárcenas, C; I	2007	The cycads of Mexico: 25 years of research and conservation	Mem. New York Bot. Gard. 97: 611-641
Vovides, AP; Iglesias, CG; Cruz, M; Hernández Reyes, J; Hernández Cuevas, L; Gal	2012	The effect of taproot pruning and AMF mycorrhiza on growth and development of Dioon angustifolium Miq. seedlings	Mem. New York Bot. Gard. 106: 263-278
Vovides, AP; Iglesias, CG; Reyes, S A; Morales, S S	2003	New cycad (Zamiaceae) reports from Chiapas, Oaxaca, and Tabasco, Mexico	Rhodora 105(924): 379-384		[Abstract]
Vovides, AP; Luna, V; Medina, G	1997	Relación de algunas plantas y hongos mexicanos raros, amenazados o en peligro de extinción y sugerencias para su conservación.	Acta Bot. Mex. 39: 1-42
Vovides, AP; Moreno, NP	1983	Proposal to conserve the spelling Dioon against Dion (Zamiaceae)	Taxon 32(3): 484-485
Vovides, AP; Norstog, K; Fawcett, PKS; Duncan, MW; Nash, RJ; Molsen, DV	1993	Histological changes during maturation in male and female cones of the cycad Zamia furfuracea and their significance in relation to pollination biology	Bot. J. Linn. Soc. 111(2): 241-252
Vovides, AP; Ogata, N; Sosa, V; Peña-García, E	1997	Pollination of endangered Cuban cycad Microcycas calocoma (Miq) A DC.	Bot. J. Linn. Soc. 125(3): 201-210
Vovides, AP; Olivares, M	1996	Karyotype polymorphism in the cycad Zamia loddigesii (Zamiaceae) of the Yucatan peninsula, Mexico	Bot. J. Linn. Soc. 120(1): 77-83
Vovides, AP; Pérez-Farrera, MA; González-Astorga, J; Iglesias, CG	2008	A new species of Ceratozamia (Zamiaceae) from Oaxaca, Mexico with comments on habitat and relationships	Bot. J. Linn. Soc. 157(2): 169-175	Ceratozamia chimalapensis
Vovides, AP; Pérez-Farrera, MA; Iglesias, CG	2010	Cycad propagation by rural nurseries in Mexico as an alternative conservation strategy: 20 years on	Kew Bull. 65(4): 603-611		[Abstract]
Vovides, AP; Pérez-Farrera, MA; Schutzman, B; Iglesias, CG; Hernandez-Sandoval,	2004	A new species of Ceratozamia (Zamiaceae) from Tabasco and Chiapas, Mexico	Bot. J. Linn. Soc. 146(1): 123-128	Ceratozamia becerrae
Vovides, AP; Rees, JD	1980	Datos adicionales sobre Ceratozamia hildae Landry et Wilson	Biotica 5(1): 1-4
Vovides, AP; Rees, JD; Vázquez-Torres, M	1983	Zamiaceae	Fl. Veracruz 26: 1-31
Vovides, AP; Stevenson, DW; Pérez-Farrera, MA; López, S; Avendaño, S	2016	What is Ceratozamia mexicana (Zamiaceae)?	Bot. Sci. 94(2): 419-429
Vovides, AP; Vázquez-Torres, M; Schutzman, B; Iglesias, CG	1993	A new species of Ceratozamia (Zamiaceae) from Queretaro and Hidalgo, Mexico	Novon 3: 502-506	Ceratozamia sabatoi
Wallace, JW	1972	A survey for benzoic and cinnamic acids of the Cycadaceae	Amer. J. Bot. 59(1): 1-4
Wallenius, TC; Peakall, R; Wanjura, WJ; Chyb, S; Oberprieler, RG	2012	Volatile emissions, thermogenesis, and dehiscence patterns of Macrozamia communis (Zamiaceae): Implications for cycad pollination research	Mem. New York Bot. Gard. 106: 395-418
Wallnofer, B	1996	New or noteworthy species of Aegiphila, Styrax and Zamia	Linzer Biol. Beitr. 28(2): 1053-1060	Zamia urep
Walters, TW	1999	Off-site cycad preservation: I. what is off-site preservation?	Cycad Newslett. 22(1): 10-12
Walters, TW	1999	Off-site cycad preservation: II. How to develop off-site collections	Cycad Newslett. 22(2): 9-12
Walters, TW	1999	Off-site cycad preservation: III. A final look at off-site collections	Cycad Newslett. 22(3): 8-11
Walters, TW	2003	Off-site collections	Cycads: Status, Survey, and Conservation Action Plan : 48-53
Walters, TW	2003	Panzhihua Su-tie	Cycad Newslett. 26(4): 10-11
Walters, TW; Decker-Walters, DS	1991	Patterns of allozyme diversity in the West Indies cycad Zamia pumila (Zamiaceae)	Amer. J. Bot. 78(3): 436-445
Wang, D-Y; Deng, C-Y	1995	Cycas segmentifida, a new species from China	Encephalartos 43: 11-14	Cycas segmentifida protologue
Wang, DY	1996	Cycas elonga (Leandri) DY.Wang.	Cycads China : 51-53	Cycas elongata protologue
Wang, DY	1996	Cycas multifrondis D.Y.Wang sp. nov.	Cycads China : 80-83	Cycas multifrondis protologue
Wang, DY	1996	Cycas tanquingii D.Y.Wang sp. nov.	Cycads China : 134-138	Cycas tanqingii protologue
Wang, DY	1996	Taxonomy of Cycas in China	Cycads China 51: 33-142	Protologue description(s): C. fairylakea, C. longipetiolula, C. multifrondis, C. multiovula, C. parvulus, C. hongheensis, C. tanqingii; New combination(s): Cycas elongata, C. javana
Warburg, O	1900	Cycadaceae	Monsunia 1: 178-181
Ward, DB	2001	New combinations in the Florida flora	Novon 11
Ward, DB	2016	Keys to the flora of Florida - 32, Zamia (Zamiaceae)	Phytologia 98(3): 170-178	Zamia integrifolia var. broomei protologue
Warszewicz, J	1845	Correspondez Rachricht	Allg. Gartenzeitung 13: 252-254	Zamia variegata protologue
Watson, JB	1987	Cycads in the garden	Fairchild Trop. Gard. Bull. 42(3): 34-37
Webb, DT	1982	Effects of light intensity on root growth and nodulation of Zamia floridana embryos in sterile culture	Phytomorphology 32(1): 81-84
Webb, DT	1982	Effects of light on root growth, nodulation, and apogeotropism of Zamia pumila L. seedlings in sterile culture	Amer. J. Bot. 69(2): 298-305
Webb, DT	1982	Structure and ultrastructure of plastids in light- and dark-grown Zamia floridana DC. seedling roots in vitro	New Phytol. 91: 721-725
Webb, DT	1983	Developmental anatomy of light-induced root nodulation by Zamia pumila L. seedlings in sterile culture	Amer. J. Bot. 70(8): 1109-1117
Webb, DT	1983	Effects of light on root nodulation and elongation of seedlings in sterile culture of Bowenia serrulata.	Phytomorphology 31(1-2): 121-123
Webb, DT	1983	Nodulation in light- and dark-grown Macrozamia communis L. Johnson seedlings in sterile culture	Ann. Bot. (Oxford), n.s. 52(4): 543-547
Webb, DT	1984	Developmental anatomy and histochemistry of light-induced callus formation by Dioon edule (Zamiaceae) seedling roots in vitro	Amer. J. Bot. 71(1): 65-68
Webb, DT; de Jesus, S	1982	Root nodulation in embryos of Macrozamia diplomera in sterile culture	Phytomorphology 32(2-3): 253-256
Webber, HJ	1897	Notes on the fecundation of Zamia and the pollen tube apparatus of Ginkgo	Bot. Gaz. 24: 225-235
Webber, HJ	1897	The development of the antherozoids of Zamia	Bot. Gaz. 24: 16-22
Wei, FN	1994	A new cycad from Guagxi	Guihaia 14: 300	Cycas ferruginea protologue
Wei, Z; Meng-Meng, G; Xun, G	2015	Cycas chenii (Cycadaceae), a new species from China, and its phylogenetic position	J. Syst. Evol. 53(6): 489-498		[Abstract]
Weiss, JH; Choi, DW	1988	b-N-methylamino-L-alanine neurotoxicity: requirement for bicarbonate as a cofactor.	Science 241: 973-975
Wendland, H	1854	Descriptio speciei novae e genere Ceratozamiae	Index Palm. : 68
Wendland, H	1854	Index Palmarum, Cyclanthearum, Pandanearum, Cycadearum, quae in hortis europaeis coluntur	Index Palm. : 49-54	Ceratozamia miqueliana protologue
Whitelock, LM	1993	Field studies of the genus Cycas in Australia, Thailand and China	Proc. Second Int. Conf. Cycad Biol. : 300-316
Whitelock, LM	2004	Notes on Zamia splendens	Cycad Newslett. 27(2): 9-11
Whitelock, LM	2004	Range and variation in the genus Ceratozamia (Zamiaceae)	Bot. Rev. (Lancaster) 70(2): 235-239
Whitelock, LM	2004	Variation in the Mexican cycad Dioon edule.	Bot. Rev. (Lancaster) 70(2): 240-249
Whitelock, LM; Broome, T	2002	Focus on growing cycads: Zamia inermis	Cycad Newslett. 25(3): 10-11
Wieland, GR	1916	American fossil cycads	Amer. Foss. Cycads 2
Wiese, C; Mannion, C	2007	Managing Cycad Aulacaspis Scale (Aulacaspis yasumatusi Takagi) at Montgomery Botanical Center, USA	Mem. New York Bot. Gard. 97: 64-72
Wildeman, E de	1903	Études de la systematique et de géographie botanique sur la flore du Bas- et du Moyen-Congo	Ann. Mus. Congo Belge, Bot. 1(1): 1-80	Encephalartos laurentianus protologue
Wilf, P; Stevenson, DW; Cúneo, NR	2016	The last Patagonian cycad, Austrozamia stockeyi gen. et sp. nov., early Eocene of Laguna del Hunco, Chubut, Argentina1	Botany 94(9): 817-829		[Abstract]
Willdenow, CL	1806	Zamia muricata	Sp. Pl., ed. 4 [Willdenow] 4(2): 847-848
Willdenow, CL	1806	Zamia tenuis	Sp. Pl., ed. 4 [Willdenow] 4(2): 846
Wilson, AF	1993	Possible role of cycadales in formation of micro-nuggets of gold in soil	Proc. Second Int. Conf. Cycad Biol. : 211-212
Wilson, GW	2001	Focus on Bowenia serrulata	Encephalartos 65: 19-23
Wilson, GW	2002	Focus on Bowenia spectabilis	Encephalartos 70: 10-16
Wilson, GW	2002	Insect pollination in the cycad genus Bowenia Hook. ex Hook. f. (Stangeriaceae)	Biotropica 34(3): 438-441
Wilson, JM; Khabazian, I; Wong, MC; Seyedalikhani, A; Bains, JS; Pasqualotto, BA	2002	Behavioral and neurological correlates of ALS-parkinsonism dementia complex in adult mice fed washed cycad flour	Neuromolecular Med 1(3): 207-21		[Abstract]
Wilson, JS, C A	2006	Commentary on: Return of the cycad hypothesis - does the amyotrophic lateral sclerosis/parkinsonism dementia complex (ALS/PDC) of Guam have new implications for	Neuropathology and Applied Neurobiology 32(3): 341-343
Wittmack, L	1899	Dioon edule und Dioon edule var. lanuginosum Wittmck.	Gartenflora 48: 153
Wood, JM	1908	Colonial noteEncephalartos woodii	Gard. Chron. ser. 3 43: 414	Encephalartos woodii protologue
Woodenberg, W; Govender, J; Murugan, N; Ramdhani, S; Sershen	2019	Cycad forensics: leaflet micromorphology as a taxonomic tool for South African cycads	Pl. Syst. Evol. 305(6): 445-457		[Abstract]
Wordsell, WC	1896	The anatomy of the stem of Macrozamia compared with that of other genera of Cycadaceae	Ann. Bot. (Oxford) 10(4): 602-620
Wordsell, WC	1906	The structure and origin of the Cycadaceae	Ann. Bot. (Oxford) 20(2): 129-159
Wu, C-S; Huang, Ya-Yi	2013	Chloroplast Phylogenomics Indicates that Ginkgo biloba Is Sister to Cycads	Genome Biol Evol. (1): 243
Wu, C-S; Wang, YN; Liu, SM; Chaw, SM	2007	Chloroplast genome (cpDNA) of Cycas taitungensis and 56 cp protein-coding genes of Gnetum parvifolium: insights into cpDNA evolution and phylogeny of extant seed	Mol Biol Evol 24(6): 1366-79		[Abstract]
Xiao, L; Gong, X; Hao, G; Ge, X; Tian, B; Zheng, S	2005	Comparison of the genetic diversity in two species of cycads	Austral. J. Bot. 53(3): 219-223		[Abstract]
Xiao, LQ; GE, XJ; Gong, X; Hao, G; Zheng, SX	2004	ISSR variation in the endemic and endangered plant Cycas guizhouensis (Cycadaceae)	Ann. Bot. (Oxford), n.s. 94(1): 133-138		[Abstract]
Xiao, LQ; Gong, X	2006	Genetic differentiation and relationships of populations in the Cycas balansae complex (Cycadaceae) and its conservation implications	Ann. Bot. (Oxford), n.s. 97(5): 807-812
Xie, J; Jian, SG; Liu, N	2005	Genetic variation in the endemic plant Cycas debaoensis on the basis of ISSR analysis	Austral. J. Bot. 53(2): 141-146		[Abstract]
Yagi, F	2004	An endogenous glycoside, macrozamin, is inhibitory toward a lectin from leaves of Japanese cycad	Glycobiology 14(11): 1128-1128
Yagi, F	2004	Azoxyglycoside content and beta-glycosidase activities in leaves of various cycads	Phytochemistry 65(24): 3243-7		[Abstract]
Yagi, F; Tadera, K; Kobayashi, A	1985	Formation of three new trisaccharide-azoxyglycosides by transglucosylation by cycad ß-glucosidase	Agric. Biol. Chem. 49(10): 2985-2990
Yagi, FI; Haraguchi, T; Goldstein, IJ	2002	The lectin from leaves of Japanese cycad, Cycas revoluta Thunb. (gymnosperm) is a member of the jacalin-related family	European Journal of Biochemistry 269(17): 4335-4341		[Abstract]
Yagi, FT	1987	Azoxyglycoside contents in seeds of several Cycad species and various parts of Japanese Cycad	Agricultural & Biological Chemistry 51: 1721
Yang, SL; Hill, KD; Nguyên, TH	1997	Cycas lindstromii (Cycadaceae), a new species from Southern Vietnam	Novon 7(2): 213-215
Yang, SL; Hill, KD; Vatcharakorn, P	1999	Cycas pranburiensis (Cycadaceae), a new cycad from Thailand	Brittonia 51(1): 44-47
Yang, SL; Meerow, AW	1996	The Cycas pectinata (Cycadaceae) complex: genetic structure and gene flow.	Int. J. Pl. Sci. 157(4): 468-483
Yang, SY; Yang, SL	1996	C. hongheensis S.Y.Yang et S.L.Yang.	Cycads China : 62-65	Cycas hongheensis protologue
Yarowsky, P; McDowell, KA; Shen, WB; Wilson, JMB; Cruz-Aguado, R; Marler, TE; Sh	2012	Cycad-induced neurodegeneration is different in rat and mouse models of ALS- PDC	Mem. New York Bot. Gard. 106: 279-294
Yessoufou, K; Bamigboye, SO; Daru, BH; Bank, M van der	2014	Evidence of constant diversification punctuated by a mass extinction in the African cycads	Ecol Evol 4(1): 50-8		[Abstract]
Zerolo, JM	2003	Encephalartos laurentianus, an experience to share	Cycad Newslett. 26(4): 6-8
Zhang, HD; Zhong, YC; Huang, YY; Zheng, HX; Lu, ZF	1998	Additions to the Cycadaceous flora of China	Acta Sci. Nat. Univ. Sunyatseni 37(4): 6-8
Zhang, W; Yang, X-J; Fu, X-P; Zheng, S-L; Wang, Y-D	2012	A polyxylic Cycad trunk from the Middle Jurassic of western Liaoning, China, and its evolutionary implications	Review Palaeobotany & Palynology 183: 50-60		[Abstract]
ZhaoFu, Z	1998	Additions to the Cycadaceous flora of China.	Acta Sci. Nat. Univ. Sunyatseni 37(4): 6-8
Zhong, YC; Chen, CJ	1997	Cycas debaoensis YC.Zhong et C.J.Chen--a new cycad from China.	Acta Phytotax. Sin. 35(6): 571	Cycas debaoensis protologue
Zhou, L; Yang, SY; L.K.Fu & S.Z.Cheng	1981	Two new species of Cycas from Sichuan	Acta Phytotax. Sin. 19(3): 335-338
Zhou, L; Yang, SY; Zhou, Z	1990	Investigation of the natural community of Cycas panzhihuaensis L. Zhou & SY Yang	Mem. New York Bot. Gard. 57: 148-151
Zhou, W; Guan, M; Gong, X	2015	Cycas chenii (Cycadaceae), a new species from China, and its phylogenetic position	J. Syst. Evol. : 1-10Advance online publication. doi:
Zimmerman, WJR	1992	Cyanobiont diversity within and among Cycads of one field site	Canadian J. Microbiology 38(12): 1324-1328		[Abstract]
Zonneveld, BJ	2012	Genome sizes for all genera of Cycadales	Plant Biol (Stuttg) 14(1): 253-6		[Abstract]
Zuo, BY; Jiang, GZ; Zhang, Q; Chen, CJ	2004	The response of ultrastructure and function of chloroplasts from cycads to doubled-CO2 concentration.	Bot. Rev. (Lancaster) 70(1): 72-78

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