- Cycadophyta - http://plantnet.rbgsyd.gov.au/PlantNet/cycad/foss.html
Fossil history.
- Introduction to the Cycads - http://www.ucmp.berkeley.edu/seedplants/cycadophyta/cycads.html
An excellent place to begin learning about the Cycads
- Virtual Cycad Encyclopedia - http://www.plantapalm.com/vce/vce_index.htm
Good source for information on Cycads. Includes taxonomy, biology, photos, links.
- PACSOA - Cycads - http://www.pacsoa.org.au/cycads/
Includes many articles, detailed species accounts, and images. From the Palm and Cycad Societies of Australia (PACSOA).
- The Cycad Pages - http://plantnet.rbgsyd.gov.au/PlantNet/cycad/index.html
Extensive botanical database on the known cycads, including identification and classification, ecology and conservation, cycad evolution and the fossil record, geography and distribution, and horticultural information.
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