''Acer calcaratum'' is an Asian species of

maple ''Acer'' () is a genus of trees and shrubs commonly known as maples. The genus is placed in the family Sapindaceae.Stevens, P. F. (2001 onwards). Angiosperm Phylogeny Website. Version 9, June 2008 nd more or less continuously updated since http ...

found in

Yunnan Yunnan , () is a landlocked Provinces of China, province in Southwest China, the southwest of the People's Republic of China. The province spans approximately and has a population of 48.3 million (as of 2018). The capital of the province is ...

and northern Indochina (

Myanmar Myanmar, ; UK pronunciations: US pronunciations incl. . Note: Wikipedia's IPA conventions require indicating /r/ even in British English although only some British English speakers pronounce r at the end of syllables. As John C. Wells, Joh ...

Thailand Thailand ( ), historically known as Siam () and officially the Kingdom of Thailand, is a country in Southeast Asia, located at the centre of the Indochinese Peninsula, spanning , with a population of almost 70 million. The country is bo ...

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 ...

). It is very rare in China.Flora of China, ''Acer calcaratum'' Gagnepain, 1948. 三裂枫 san lie feng
/ref> ''Acer calcaratum'' is a small tree up to 7 meters tall. Leaves are non-compound, the blade up to 15 cm long and 21 cm wide, with 3 deeply cut lobes but no teeth.Gamble, James Sykes 1908. Bulletin of Miscellaneous Information Kew 1908: 446
description in Latin, commentary in English, as ''Acer osmastonii''

References

calcaratum Flora of Yunnan Flora of Myanmar Flora of Thailand Flora of Vietnam Plants described in 1872 {{Sapindales-stub