Cycas

From Wikipedia, the free encyclopedia
Jump to: navigation, search
Cycas
Leaves and male cone of Cycas revoluta
Scientific classification
Kingdom: Plantae
Division: Cycadophyta
Class: Cycadopsida
Order: Cycadales
Family: Cycadaceae
Persoon
Genus: Cycas
L.

Cycas is a genus of plants. It is the only genus currently known in the cycad family. About 95 species are currently known.

Probably the best-known of these is marketed as Sago Palm or King Sago Palm. The plant is not a true palm, however. The generic name comes from Greek kykas and means "palm tree".

The genus is native to the Old World, with most species around the equatorial regions. It is native to eastern and southeastern Asia including the Philippines with 6 species (4 of which are endemic), eastern Africa (including Madagascar), northern Australia, Polynesia, and Micronesia. Australia has 26 species, while the Indo-Chinese area has about 30. The northernmost species (C. revoluta) is found at 31°N in southern Japan. The southernmost (C. megacarpa) is found at 26°S in southeast Queensland, Australia.

The plants have often been considered to be a living fossil. The earliest fossils of the genus Cycas appear in the Cainozoic, but Cycas-like fossils occur well into the Mesozoic. Cycas is not closely related to other genera of cycads. Phylogenetic studies have shown that Cycadaceae is the sister-group to all other extant cycads.

Other websites[change | edit source]

  • Cycad Pages: Cycas
  • Singh R. & Radha P. 2006. Cycas annaikalensis, a new species of Cycas from the Malabar Coast, Western Ghats, India. Brittonia 58 (2): 119-123.