taxonomytitle.gif (3134 bytes)

Key to Ceratozamia Species

1 Rhachis spirally twisted
Rhachis not spirally twisted
Go to 2
Go to 3
2 Leaves to 2 m long; leaflets to 50 cm long
Leaves to 1 m long; leaflets to 25 cm long
C. norstogii
C. zaragozae
3 Leaflets arranged in clusters
Leaflets arranged evenly along the rhachis
C. hildae
Go to 4
4 Leaflets widest above the middle
Leaflets widest at or below the middle
Go to 5
Go to 8
5 Leaflets less than 5 cm wide
Leaflets more than 5 cm wide
Go to 6
Go to 7
6 Leaflets to 4 cm wide
Leaflets to 3 cm wide
C. latifolia
C. microstrobila
7 Leaflets 5-8 cm wide, paper, margins flat
Leaflets 9-16 cm wide, transluscent, margins wavy
C. miqueliana
C. euryphyllidea
8 Leaflets more than 1.5 cm wide, margins flat
Leaflets lesss than 1.5 cm wide, margins revolute
Go to 9
Go to 10
9 Leaflets less than 2.5 cm wide, straight to slightly falcate
Leaflets more than 2.5 cm wide, strongly falcate
C. mexicana
C. robusta
10 Petiole and rhachis smooth or sparsely prickly
Petiole and rhachis with numerous stout prickles
C. kuesteriana
C. matudae

Note: All keys in this chapter are adapted from Jones, D. L. 1993.
Cycads of the World. Smithsonian Institution Press, Washington, D.C.

PACSOF Home Page

VCE Home Page

VCE Table of Contents

VCE Photo gallery

Virtual Cycad Encyclopedia Site Map
Powered by FreeFind.

This site is copyrighted © 1998-2006, Palm & Cycad Societies of Florida, Inc.
For questions or comments, e-mail the webmaster.
Internet hosting provided by Zone 10, Inc.