Caularthron

Caularthron Raf. (1837), abbreviated Cau.^[2] in the horticultural trade, is a genus of orchids with 4 species.^[3] They are epiphytic orchids with specialized hollow pseudobulbs that house ants. The genus is exclusively found in the tropical regions of southern Mexico, Central America, the West Indies, and northern South America.^[1]

Caularthron
Caularthron bicornutum
Scientific classification
Kingdom:	Plantae
Clade:	Tracheophytes
Clade:	Angiosperms
Clade:	Monocots
Order:	Asparagales
Family:	Orchidaceae
Subfamily:	Epidendroideae
Tribe:	Epidendreae
Subtribe:	Laeliinae
Genus:	Caularthron Raf. (1837)
Synonyms[1]
Diacrium Benth.

List of species

Species accepted as of May 2014:^[1]

Image	Name	Distribution	Elevation (m)
	Caularthron amazonicum (Schltr.) H.G.Jones (1968)	Trinidad, Venezuela, Brazil
	Caularthron bicornutum (Hook.) Raf. (1837) 2n = 40, n = 20.[4]	Trinidad-Tobago, Venezuela, Brazil, Suriname, Guyana, Colombia
	Caularthron bilamellatum (Rchb.f.) R.E.Schult. (1958)	Belize, Central America, northern South America (Roraima, Venezuela, Colombia, Ecuador), Trinidad, Chiapas	0 - 700
	Caularthron kraenzlinianum H.G.Jones (1980)	Windward Islands