| Cycas diannanensis | |
|---|---|
 | |
Scientific classification  | |
| Kingdom: | Plantae |
| Clade: | Tracheophytes |
| Clade: | Gymnospermae |
| Division: | Cycadophyta |
| Class: | Cycadopsida |
| Order: | Cycadales |
| Family: | Cycadaceae |
| Genus: | Cycas |
| Species: | C. diannanensis |
| Binomial name | |
| Cycas diannanensis Z.T.Guan & G.D.Tao | |
Cycas diannanensis is a species of cycad endemic to Yunnan, China.
It is found along the Red River valley from Hekou to Shuangbai County in Yunnan Province. [2] It has also been recorded from Manhao, Gejiu City, Yunnan Province. It is also cultivated in the Shenzhen Fairy Lake Botanical Garden, the Forestry Institute of Pingbian County, and the Xishuangbanna Tropical Botanical Garden. [3]
Cycas pruinosa is a small to medium species of cycad, a palm-like seed plant. It is a widespread but sporadic species in the eastern and southern Kimberley region of Western Australia, occurring also in the Spirit Hills on Bullo River Station in the Northern Territory.
Cycas pectinata was the fourth species of Cycas to be named; it was described in 1826 by Scottish surgeon and botanist Francis Buchanan-Hamilton from Kamrup, Assam in northeast India. The species is one of the most widespread cycads. It is found in the northeastern part of India, Nepal, Bhutan, northern Burma, southern China (Yunnan), Bangladesh, Burma, Malaysia, Cambodia, northern Thailand, Laos, and Vietnam. Cycas pectinata usually grow at elevation 300 m to 1200 m and in difficult terrains. In China, it grows in dry, open thickets in limestone mountains, red soil in sparse monsoon forests. Cycas pectinata grows up to 40 feet (12 m) tall and has very large, ovoid male cones. The tallest Cycas pectinata is a female plant in North Kamrup, Assam which measures 52.8 feet (16.1 m). The tree is the world's tallest Cycas plant. In Northeast India, the species is under severe threat due to clearing of forest and overcollection of male cones for preparation of traditional medicines. The species is listed in CITES Appendix II and IUCN Redlist.
Cycas panzhihuaensis is a rare and vulnerable species of cycad known in the wild only from Sichuan and Yunnan provinces in China. It can be seen at the South China Botanical Garden in Guangzhou and is also cultivated for horticulture, where it is often known as the Dukou sago palm.
Cycas ferruginea is a plant species native to Vietnam and to the Guangxi region of China. It grows on rocky crevices in forested areas at elevations of 200–500 m. It is known from a belt of limestone bluffs in Lang Son Province and Thai Nguyen Province in Vietnam, and in western Guangxi Province, China. It is also cultivated at the Guilin Botanical Garden, Guangxi.
Cycas multipinnata, common name Royal Sago, is a species of cycad or Sago Palm 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. Cultivated plants have had petioles as long as thirteen feet. 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.
Cycas clivicola is a species of cycad in Thailand, Cambodia, Vietnam, and Malaysia. It is found on limestone outcrops, as well as on offshore islands.
Cycas collina is a species of cycad. It is found in the Mai Sơn area of Sơn La Province, Vietnam and in Sipsongpanna, Yunnan, China. It may also exist in Laos and Myanmar.
Cycas dolichophylla is a species of cycad in northern Vietnam and southern China.
Cycas sexseminifera is a species of cycad in northern Vietnam and southern China.
Cycas segmentifida is a species of cycad endemic to southern China. It is found in primarily western Guangxi, as well as parts of neighboring southern Guizhou and eastern Yunnan.
Cycas seemannii is a species of cycad found in Fiji, Vanuatu, Tonga, and New Caledonia.
Cycas pranburiensis is a species of cycad endemic to Thailand. It is found only in the Khao Sam Roi Yot National Park area of Prachuap Khiri Khan Province. It is named after Pran Buri District in Thailand, where it was discovered.
Cycas papuana is a species of cycad endemic to Papua New Guinea. It is found in Western Province, including the floodplains of the Fly River and near Daru to the west, and also extending to the Bensbach River.
Cycas guizhouensis is a species of cycad endemic to southwestern China.
Cycas fugax is a species of cycad endemic to Vietnam. It has only been recorded in the wild from Phu Tho Province, Vietnam, but may be reasonably common in cultivation in Hanoi.
Cycas hainanensis is a species of cycad in Hainan, China. It is protected in some forest reserves and in Tongguling National Nature Reserve (铜鼓岭国家级自然保护区), Wenchang County. In Hainan, it is also found in Wanning and Haikou districts.
Cycas macrocarpa is a species of cycad in Malaysia and Thailand.
Cycas wadei is a species of cycad endemic to Culion island, Philippines. There is only one subpopulation of about 5,000 mature individuals, located in a small area to the east of Halsey Harbor.
Cycas tanqingii is a species of cycad in China and Vietnam. It is found in Luchun County, southern Yunnan Province, China, and in Lai Châu Province, Vietnam. In China, it is located in the Xiaoheidiang River and Heishui River watersheds. In Luchun County, it is protected in Huanglian Mountain National Nature Reserve. It is also cultivated at the Shenzhen Fairy Lake Botanical Garden and at the Forestry Bureau of Luchun County.
Cycas shanyaensis is a species of cycad endemic to Hainan, China.
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