Key to Cycad Genera

Key to Cycad Genera
(The smaller genera also have keys to species; click on the genus name to view. For the larger genera--
i.e., Cycas, Encephalartos, and Zamia--the link will take you to Ken Hill's keys in The Cycad Pages.)

1	Leaves bipinnate Leaves pinnate	*Bowenia* Go to 2
2	Leaflets with a prominent midrib Leaflets lacking a prominent midrib	Go to 3 Go to 5
3	Leaflet margins entire, lateral veins absent Leaflet margins irregular or toothed, lateral veins present	*Cycas* Go to 4
4	Lateral veins arising at right angle to midrib Lateral veins arising at acute angle to midrib	Stangeria Chigua
5	Leaflets attached to upper surface of rhachis Leaflets attached to margins of rhachis	Lepidozamia Go to 6
6	Swollen, often colorful small patch of callous tissue at base of upper leaflet margin Colorful callous tissue absent from the base of upper leaflet margin	Macrozamia Go to 7
7	Leaflets not jointed to rhachis, cataphylls present on cone stalk Leaflets jointed to rhachis, cataphylls absent on cone stalk	Go to 8 Go to 9
8	Sporophyll ends faceted, seeds attached directly to sporophyll, leaflets weakly decurrent on rhachis Sporophyll ends not faceted, seeds attached to sporophylls by a basal stalk, leaflets strongly decurrent on rhachis	Encephalartos Dioon
9	Leaflets reflexed, prickles absent on petiole and rhachis Leaflets spreading, prickles present or absent on petiole and rhachis	Microcycas Go to 10
10	Sporophylls with two horns, leaflets entire Sporophylls lacking horns, leaflets with teeth or entire	Ceratozamia Zamia

This site is copyrighted © 1998, 1999, 2000, Palm & Cycad Societies of Florida (PACSOF)
For questions or comments, e-mail the webmaster.
Internet hosting provided by Zone 10, Inc.

PACSOF Home Page	VCE Home Page	VCE Table of Contents	VCE Photo gallery
Virtual Cycad Encyclopedia Site Map Powered by FreeFind.