Caularthron, abbreviated Clrthr in horticultural trade, is a small genus of four species from the orchid family (Orchidaceae).
This genus is distributed from Trinidad, Tobago, Brazil and tropical South America.
They are epiphytic orchids with specialized hollow pseudobulbs that house ants. Species in this genus have 4 pollinas.
Plants should be grown in warm temperature with bright light. Water about twice a week in the summer and reduce to once a week as winter approaches. Plants can be grown in a well drain coarse mixture of bark and perlite or mounted.
They grow well in an intermediate greenhouse with medium to bright light. Temperatures up to 30 degrees in
summer and as low as 2 degrees in winter. Plants should be fairly dry in winter.
The name is derived from the Greek word kaulos, which means stem and arthron, which means joint in reference to the leaf bases on the pseudobulbs.
- Diacrium Lindley 1881
- Caularthron amazonicum (Schltr.) H.G.Jones, 1968.
- Caularthron bicornutum (Hook.) Raf., 1837.
- Caularthron bilamellatum (Rchb.f.) R.E.Schult., 1958.
- Caularthron kraenzlinianum H.G.Jones, 1980 publ. 1981.
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