Resources for Botanizing in the Washington, D.C., Region
Cycadophyta (Cycads)
Selected Website
The Cycad Pages
Hill, Ken.
2004.
The Cycad Pages.
Royal Botanic Gardens.
http://plantnet.rbgsyd.gov.au/PlantNet/cycad/foss.html
(14 March 2004)
(world list, evolution, etc.)