Katolog > Science > Biology > Flora and Fauna > Plantae > Cycadophyta

Group of coned, seed-bearing plants. Cycads are among the oldest of the land plants. They are known to have lived in the Permian, over 200 million years ago (before the age of dinosaurs) and they covered much of the earth in the Mesozoic Era. Today they are found only in tropical and subtropical regions of the world. There are about 250 species in 11 genera. Cycad plants resemble palms or tree-ferns in overall appearance.

Kategorier

Cycadopsida (646)

Links:

Cycadophyta Fossil history. plantnet.rbgsyd.gov.au/PlantNet/cycad/foss.html

Introduction to the Cycads An excellent place to begin learning about the Cycads www.ucmp.berkeley.edu/seedplants/cycadophyta/cycads.html

Virtual Cycad Encyclopedia Good source for information on Cycads. Includes taxonomy, biology, photos, links. www.plantapalm.com/vce/vce_index.htm

PACSOA - Cycads Includes many articles, detailed species accounts, and images. From the Palm and Cycad Societies of Australia (PACSOA). www.pacsoa.org.au/cycads

The Cycads: Fossils of the Past An introduction. www.plantapalm.com/vce/intro/fossilspast.htm

The Cycad Pages 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. plantnet.rbgsyd.gov.au/PlantNet/cycad/index.html

University of Georgia Greenhouses - Non-flowering Plants Includes images of the cycad collection. www.plantbio.uga.edu/greenhouses-cycads.html