genus of plants
(Redirected from Cycadaceae)

Cycas is a genus of plants. It is the only genus currently known in the Cycadaceae family. Over 100 species are known.

Cycas inflorescence.jpg
Leaves and male cone of Cycas revoluta
Scientific classification


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".

Cycas is native to the Old World; most species are 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 living cycads.

Other websitesEdit

  • 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.