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)	Central America, northern South America (Roraima, Venezuela, Colombia, Ecuador), Trinidad, Chiapas	0 - 700
	Caularthron kraenzlinianum H.G.Jones (1980)	Windward Islands

References

1. Kew World Checklist of Selected Plant Families
2. http://www.rhs.org.uk/RHSWebsite/files/87/87be8b1e-908e-4e04-9ee6-30c438354458.pdf%5B%5D downloaded October 3, 2010
3. Information retrieved from http://apps.kew.org/wcsp/qsearch.do on October 3, 2010, after entering "Caularthron".
4. page 251 of Leonardo P. Felix and Marcelo Guerra: "Variation in chromosome number and the basic number of subfamily Epidendroideae (Orchidaceae)" Botanical Journal of the Linnean Society 163(2010)234-278. The Linnean Society of London. downloaded October 2010 from http://onlinelibrary.wiley.com/doi/10.1111/j.1095-8339.2010.01059.x/pdf