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The World List of Cycads
A Comprehensive Taxonomic Reference

About The World List of Cycads

This site hosts the official online edition of The World List of Cycads, a comprehensive compilation of cycad names including accepted names, synonyms, illegitimate names, nomina dubia, and invalidly published names .

The printed edition of the World List is published under the auspices of the IUCN/SSC Cycad Specialist Group in the proceedings of the International Conference of Cycad Biology, which is held every three years. The most recent printed version was published in 2018 in the Proceedings of the 9th International Conference of Cycad Biology and is available here. Additional information about the printed versions of the World List and standards used by the site can be found in the About Us page.

The online version of the World List of Cycads is periodically updated to reflect changes in cycad nomenclature and taxonomy. The current list consists of a total of 10 accepted genera and 368 accepted species, divided as follows: Bowenia (2), Ceratozamia (35), Cycas (120), Dioon (18), Encephalartos (65), Lepidozamia (2), Macrozamia (41), Microcycas (1), Stangeria (1), and Zamia (83).

Users can search all cycad names using several different fields or browse all currently accepted names. Additional information provided for names includes details associated with their publication, nomenclatural types, distribution, and conservation status.