Biology:Cycas multipinnata
| Cycas multipinnata | |
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Scientific classification 
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| Kingdom: | Plantae |
| Clade: | Tracheophytes |
| Clade: | Gymnospermae |
| Division: | Cycadophyta |
| Class: | Cycadopsida |
| Order: | Cycadales |
| Family: | Cycadaceae |
| Genus: | Cycas |
| Species: | C. multipinnata
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| Binomial name | |
| Cycas multipinnata C.J.Chen & S.Y.Yang
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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).[2][3] 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:[4]
- 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.[5]
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. https://www.iucnredlist.org/species/42048/10637701. 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. https://www.iucnredlist.org/species/42048/10637701. Retrieved 11 January 2020.
- ↑ Whitelock, Loran M. 2002. The Cycads. Portland: Timber Press. ISBN:0-88192-522-5
Wikidata ☰ Q10262637 entry
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