Cynanchum is a genus of about 300 species including some swallowworts, belonging to the family Apocynaceae. The taxon name comes from Greek kynos and anchein, hence the common name for several species is dog-strangling vine. Most species are non-succulent climbers or twiners. There is some evidence of toxicity.
Keteleeria evelyniana is a species of conifer native to southern China, Laos and Vietnam. It can grow to a height of 40 metres (130 ft).
The Hainan gymnure or Hainan moonrat is a species of mammal in the family Erinaceidae. Its natural habitat is subtropical or tropical dry forests. It was thought to be endemic to the island of Hainan, China, where it is threatened due to habitat loss, but in 2018 was found to also occur in, and be rather common, in Northern Vietnam.
Vincetoxicum tsaii is a species of plant in the family Apocynaceae first described in 1941. It is endemic to Yunnan Province in China.
Vincetoxicum shaanxiense is a species of plant in the family Apocynaceae, first described in 1905. It is endemic to China, known from Gansu and Shaanxi Provinces.
Goniostemma punctatum is a species of plant in the family Apocynaceae. It is endemic to China. It grows in montane forests.
Marsdenia is a genus of plants in the family Apocynaceae first described as a genus in 1810. It is named in honor of the plant collector and Secretary of the Admiralty, William Marsden. The plants are native to tropical regions in Asia, Africa, Australia, and the Americas.
Melodinus axillaris is a species of plant in the family Apocynaceae. It is endemic to Yunnan Province in southern China.
Parepigynum is a genus of liana in the family Apocynaceae, first described as a genus in 1973. It contains only one known species, Parepigynum funingense, native to Guizhou and Yunnan Provinces in China.
Friesodielsia hainanensis, synonym Richella hainanensis, is a species of plant in the Annonaceae family, native to Hainan. It was first described in 1964. In 2004, it was assessed as "vulnerable"; in 2022, it was listed by Plants of the World Online as "extinct".
Vincetoxicum is a genus of plants in the family Apocynaceae. Although the species in Vincetoxicum have sometimes been included in Cynanchum, chemical and molecular evidence shows that Vincetoxicum is more closely related to Tylophora, now included in Vincetoxicum. The generic name means "poison-beater" in Botanical Latin because of the plants' supposed antidotal effects against snakebite.
Chonemorpha is a genus that consists of large evergreen vigorous woody vines with milky sap from India, Sri Lanka, to Southeast Asia, the Philippines and South China. Growing dormant in sub-tropical and tropical climates and usually losing leaves if temperature gets below 60F. The plants have pubescent to almost tomentose branches, leaves and inflorescences. Large, corrugated, ovate leaves to 40 cm long, deep glossy green, opposite, pale and hairy beneath. Very fragrant, funnel-shaped, showy flowers to 8 cm across with long-peduncled and terminal cymes. Corolla cream with yellow center. Disk cupular with many seeds, ovate-shaped, compressed, with scanty endosperm, with a tuft of hairs at one end, dark brown. The plant is widely grown as a fence cover.
- Chonemorpha assamensisFurtado - Assam, Bangladesh
- Chonemorpha eriostylisPit. in H.Lecomte - Yunnan, Guangdong, Vietnam
- Chonemorpha floccosaTsiang & P.T.Li - Guangxi
- Chonemorpha fragrans(Moon) Alston - China, Indian Subcontinent, Indochina, Malaysia, Indonesia, Philippines
- Chonemorpha megacalyxPierre ex Spire - Yunnan, Laos, Thailand
- Chonemorpha mollisMiq. - Java
- Chonemorpha parvifloraTsiang & P.T.Li - Yunnan, Guangxi
- Chonemorpha pedicellataRao - W Himalayas
- Chonemorpha splendensChun & Tsiang - Yunnan, Hainan
- Chonemorpha verrucosa(Blume) D.J.Middleton - Guangdong, Hainan, Yunnan, Bhutan, Assam, Bangladesh, Indonesia, Malaysia, Indochina
Epigynum auritum is a plant species in the genus Epigynum. It is native to Yunnan Province in China, as well as Assam State in India, Laos, Thailand, Myanmar (Burma), and the Peninsular region of Malaysia.
Micrechites is a genus of flowering plants in the family Apocynaceae, first described as a genus in 1857. It is native to China, the eastern Himalayas, Southeast Asia, Papuasia, and Queensland.
Cosmostigma is a genus of plants in the family Apocynaceae, first described as a genus in 1834. It is native to tropical and subtropical Asia.
- Cosmostigma cordatum(Poir.) M.R.Almeida - India, Sri Lanka
- Cosmostigma hainanenseTsiang - Hainan Province in China
- Cosmostigma philippinenseSchltr. - Philippines
Toxocarpus is a genus of plants in the family Apocynaceae. It is native to China, the Himalayas, and Southeast Asia.
Heterostemma is a genus of plants in the family Apocynaceae, first described in 1834. It is native to India, China, Taiwan, Southeast Asia, Australia, and certain islands in the Pacific.
Vincetoxicum hainanense is a species of plants in the Apocynaceae. It was first described in 1941 as Merrillanthus hainanensis, which was the only species in the genus Merrillanthus.
Quercus bella is an uncommon species of oak tree. It is native to Guangdong, Guangxi, Yunnan, and Hainan provinces of southern China and to northern Vietnam. It is placed in subgenus Cerris, section Cyclobalanopsis.
Chieniodendron is a genus of plant in the Annonaceae family. It has only one species Chieniodendron hainanense native to mainland China and Hainan. It is threatened by habitat loss.
