''Aganonerion'' is a plant genus in the family

Apocynaceae Apocynaceae (from ''Apocynum'', Greek for "dog-away") is a family of flowering plants that includes trees, shrubs, herbs, stem succulents, and vines, commonly known as the dogbane family, because some taxa were used as dog poison Members of ...

, first described in 1905. It contains only one known species, ''Aganonerion polymorphum'', native to

Indochina Mainland Southeast Asia, also known as the Indochinese Peninsula or Indochina, is the continental portion of Southeast Asia. It lies east of the Indian subcontinent and south of Mainland China and is bordered by the Indian Ocean to the west an ...

(Thailand, Laos,

Cambodia Cambodia (; also Kampuchea ; km, កម្ពុជា, UNGEGN: ), officially the Kingdom of Cambodia, is a country located in the southern portion of the Indochinese Peninsula in Southeast Asia, spanning an area of , bordered by Thailan ...

Vietnam Vietnam or Viet Nam ( vi, Việt Nam, ), officially the Socialist Republic of Vietnam,., group="n" is a country in Southeast Asia, at the eastern edge of mainland Southeast Asia, with an area of and population of 96 million, making i ...

). ''Aganonerion polymorphum'' is used medicinally and as a food, appearing for example in a traditional Vietnamese soup called ''

canh chua ''Canh chua'' (, ''sour soup'')The term ''canh'' refers to a clear broth with vegetables and often meat, and ''chua'' means "sour". or ''cá nấu'' ("cooked fish") is a Vietnamese sour soup indigenous to the Mekong Delta region of Southern ...

''. In

Vietnamese Vietnamese may refer to: * Something of, from, or related to Vietnam, a country in Southeast Asia ** A citizen of Vietnam. See Demographics of Vietnam. * Vietnamese people, or Kinh people, a Southeast Asian ethnic group native to Vietnam ** Overse ...

, the plant is called ''lá giang'', literally "river leaf." In Cambodia, it is called /vɔə tʰnɜŋ/ (វល្លិថ្នឹង) or /kaɔt prɷm/ (កោតព្រំ). This plant is a perennial herb with glabrous climbing stems of 1.6–4.0 m long. Its leaves are ovate glabrous with short petioles, and are 2.5–10 cm long and 2–5 cm wide. The tips of the leaves are sharpened while the base is cordate. Its flowers are umbel, with follicles that are 8–15 cm long and 5–8 mm wide.

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Flora of Indo-China Monotypic Apocynaceae genera Vietnamese cuisine Apocyneae {{Apocynaceae-stub