''Trigonobalanus'' is a genus of three species of evergreen
tree
In botany, a tree is a perennial plant with an elongated stem, or trunk, usually supporting branches and leaves. In some usages, the definition of a tree may be narrower, including only woody plants with secondary growth, plants that are ...
s in the family
Fagaceae, related to
oak
An oak is a tree or shrub in the genus ''Quercus'' (; Latin "oak tree") of the beech family, Fagaceae. There are approximately 500 extant species of oaks. The common name "oak" also appears in the names of species in related genera, notably ''L ...
s,
beeches and
chestnuts. The species are widely scattered, with one in northern
South America
South America is a continent entirely in the Western Hemisphere and mostly in the Southern Hemisphere, with a relatively small portion in the Northern Hemisphere at the northern tip of the continent. It can also be described as the sout ...
and two in southeast
Asia
Asia (, ) is one of the world's most notable geographical regions, which is either considered a continent in its own right or a subcontinent of Eurasia, which shares the continental landmass of Afro-Eurasia with Africa. Asia covers an are ...
; some
botanists treat the three species in separate genera. The three species, with their
authors, major synonyms, and distribution, are:
*''
Trigonobalanus doichangensis'' (A.Camus) Forman (syn. ''Formanodendron doichangensis'' (A.Camus) Nixon & Crepet) - subtropical
Yunnan
Yunnan , () is a landlocked province in 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 Kunming. The province borders the C ...
to northern
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 b ...
*''
Trigonobalanus excelsa'' Lozano, Hern. Cam. & Henao (syn. ''Colombobalanus excelsa'' (Lozano, Hern. Cam. & Henao) Nixon & Crepet) -
endemic
Endemism is the state of a species being found in a single defined geographic location, such as an island, state, nation, country or other defined zone; organisms that are indigenous to a place are not endemic to it if they are also found else ...
to
Colombia
*''
Trigonobalanus verticillata'' Forman - tropical
Indonesia
Indonesia, officially the Republic of Indonesia, is a country in Southeast Asia and Oceania between the Indian and Pacific oceans. It consists of over 17,000 islands, including Sumatra, Java, Sulawesi, and parts of Borneo and New Guine ...
and the
Malay Peninsula
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