Cycas

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Cycas
Cycas inflorescence.jpg
Leaves and male cone of Cycas revoluta
Scientific classification
Kingdom:
Division:
Class:
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Family:
Cycadaceae

Persoon
Genus:
Cycas

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

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 websites[change | change 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.