''Trigonobalanus'' is a genus of three species of evergreen trees in the family

Fagaceae The Fagaceae are a family of flowering plants that includes beeches, chestnuts and oaks, and comprises eight genera with about 927 species. Fagaceae in temperate regions are mostly deciduous, whereas in the tropics, many species occur as evergre ...

, related to oaks,

beech Beech (''Fagus'') is a genus of deciduous trees in the family Fagaceae, native to temperate Europe, Asia, and North America. Recent classifications recognize 10 to 13 species in two distinct subgenera, ''Engleriana'' and ''Fagus''. The ''Engle ...

es and

chestnut The chestnuts are the deciduous trees and shrubs in the genus ''Castanea'', in the beech family Fagaceae. They are native to temperate regions of the Northern Hemisphere. The name also refers to the edible nuts they produce. The unrelat ...

s. The species are widely scattered, with one in northern South America and two in southeast Asia; some

botanist Botany, also called , plant biology or phytology, is the science of plant life and a branch of biology. A botanist, plant scientist or phytologist is a scientist who specialises in this field. The term "botany" comes from the Ancient Greek wo ...

s treat the three species in separate genera. The three species, with their

authors An author is the writer of a book, article, play, mostly written work. A broader definition of the word "author" states: "''An author is "the person who originated or gave existence to anything" and whose authorship determines responsibility f ...

, major synonyms, and distribution, are: *'' Trigonobalanus doichangensis'' (A.Camus) Forman (syn. ''Formanodendron doichangensis'' (A.Camus) Nixon & Crepet) - subtropical Yunnan to northern Thailand *'' Trigonobalanus excelsa'' Lozano, Hern. Cam. & Henao (syn. ''Colombobalanus excelsa'' (Lozano, Hern. Cam. & Henao) Nixon & Crepet) - endemic to

Colombia Colombia (, ; ), officially the Republic of Colombia, is a country in South America with insular regions in North America—near Nicaragua's Caribbean coast—as well as in the Pacific Ocean. The Colombian mainland is bordered by the Car ...

*'' Trigonobalanus verticillata'' Forman - tropical Indonesia and the

Malay Peninsula The Malay Peninsula (Malay: ''Semenanjung Tanah Melayu'') is a peninsula in Mainland Southeast Asia. The landmass runs approximately north–south, and at its terminus, it is the southernmost point of the Asian continental mainland. The area ...

External links

WCSP: ''Trigonobalanus''
* ttp://www.efloras.org/florataxon.aspx?flora_id=2&taxon_id=210000543 Flora of China: ''Formanodendron doichangensis'' (with drawing)br>Drawing of ''Trigonobalanus verticillata''Photo of ''Colombobalanus excelsa''
Fagaceae Fagales genera {{Fagales-stub