| Cycas multipinnata | |
|---|---|
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| Conservation status | |
 Critically Endangered (IUCN 3.1) | |
Scientific classification 
| |
| Kingdom: | Plantae |
| Clade: | Tracheophytes |
| Clade: | Gymnospermae |
| Division: | Cycadophyta |
| Class: | Cycadopsida |
| Order: | Cycadales |
| Family: | Cycadaceae |
| Genus: | Cycas |
| Species: | C. multipinnata |
| Binomial name | |
| Cycas multipinnata C.J.Chen & S.Y.Yang | |
Cycas multipinnata (or Epicycas multipinnata), common name Royal Sago, is a species of cycad or Sago Palm (family Cycadaceae) in southwestern China and northern Vietnam. It is noteworthy for three things: First it is one of the tuberous species which some taxonomists segregate as the genus Epicycas. Secondly, it has the longest leaf stalks (petioles) of any Gymnosperm; up to 11.5 feet (3.5 meters). Cultivated plants have had petioles as long as thirteen feet (four meters). The total length of the bipinnate frond can be up to 23 feet seven meters) The ultimate pinnules are Y-shaped. Thirdly, this very conspicuous plant escaped notice until 1994. Among Gymnosperms, these fronds are exceeded in mass only by Encephalartos laurentianus.
Distribution
Cycas multipinnata is found in:
- Red River gorge in eastern Yunnan
- Honghe Nature Cycad Reserve, Yunnan
- Xilong Mountain Natural Reserve, Yunnan
- western Guangxi, China
- Yen Bai Province, northern Vietnam
It likely occurs in Honghe, Jianshui, Mengla, and Mile counties of Yunnan.
References
- Nguyen, H.T. (2010). "Cycas multipinnata". IUCN Red List of Threatened Species. 2010: e.T42048A10637701. doi:10.2305/IUCN.UK.2010-3.RLTS.T42048A10637701.en. Retrieved 20 November 2021.
- Botanical Review Volume 7 issue 2 (April–June 2004) p. 164
- https://www.plantapalm.com/vce/taxonomy/cycadaceae7.htm
- Nguyen, H.T. (2010). "Cycas multipinnata". IUCN Red List of Threatened Species. 2010: e.T42048A10637701. doi:10.2305/IUCN.UK.2010-3.RLTS.T42048A10637701.en. Retrieved 11 January 2020.
- Whitelock, Loran M. 2002. The Cycads. Portland: Timber Press. ISBN 0-88192-522-5
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