| Cycas pachypoda | |
|---|---|
Scientific classification  | |
| Kingdom: | Plantae |
| Clade: | Tracheophytes |
| Division: | Cycadophyta |
| Class: | Cycadopsida |
| Order: | Cycadales |
| Family: | Cycadaceae |
| Genus: | Cycas |
| Species: | C. pachypoda |
| Binomial name | |
| Cycas pachypoda K.D.Hill | |
Cycas pachypoda is a species of cycad endemic to Vietnam. It is found in Binh Thuan, Ninh Thuan, and possibly Dong Nai provinces, southern Vietnam.
Cycas is a genus of plants belonging to a very ancient lineage, the Cycadophyta, which are not closely related to palms, ferns, trees or any other modern group of plants. They are evergreen perennials which achieved their maximum diversity in the Jurassic and Cretaceous periods, when they were distributed almost worldwide. At the end of the Cretaceous, when the non-avian dinosaurs became extinct, so did most of the cycas in the Northern Hemisphere.
Cycas balansae is a species of cycad in the genus Cycas, native to southwestern China and adjacent northern Vietnam, where it occurs in dense mountain rainforests.
Cycas beddomei is a species of cycad in the genus Cycas, native to India, where it is confined to a small area of Andhra Pradesh state in the Tirumala Hills in scrubland and brush covered hills.
Cycas brachycantha is a species of cycad in the genus Cycas, native to northern Vietnam where it is endemic to Bắc Kạn Province. It grows in often soil-free cracks and crevices of limestone crests and ridges under the canopy of evergreen forests. It is found in Ba Bể National Park.
Cycas taitungensis is a species of genus Cycas endemic to Taitung County, south-eastern Taiwan. C. taitungensis, an evergreen tree, can grow up to about 5 m (16 ft) tall. The species was not described until 1994, but its specimen was once applied as the type of species Cycas taiwaniana, which is not really distributed in Taiwan according to the further research.
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 over collection of male cones for preparation of traditional medicines. The species is listed in CITES Appendix II and IUCN Redlist.
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 is a species of cycad in southwestern China and northern Vietnam.
Cycas chevalieri is a species of cycad in central Vietnam, including in Nghe An Province. It may also occur in Laos.
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 Son area of Son 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 elephantipes is a species of cycad. It is found only on a few high sandstone mesas in Nong Bua Rawe District, Chaiyaphum Province, northeastern Thailand. It is morphologically similar to Cycas pachypoda from southern Vietnam.
Cycas elongata is a species of cycad endemic to southern Vietnam.
Cycas sexseminifera is a species of cycad in northern Vietnam and southern 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 hoabinhensis is a species of cycad endemic to central Vietnam, where it is found in Hoa Binh, Ha Nam, Ha Tay, and Ninh Binh provinces.
Cycas lindstromii is a species of cycad endemic to southern Vietnam. It is found in Ba Ria-Vung Tau, Binh Thuan, Khanh Hoa, and Ninh Thuan provinces, Vietnam.
Cycas tropophylla, the Ha Long cycad, is a species of cycad endemic to Vietnam.
Cycas tanqingii is a species of cycad in China and Vietnam. It is found in Luchun County, southern Yunnan Province, China, and in Lai Chau 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.
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