The size of the Orchidaceae and the systematic distribution of epiphytic orchids.

Author(s): 
Atwood, J.T.
Year: 
1986
Journal: 
Selbyana
Volume: 
9
Issue: 
1
Page Range: 
171–186
Keywords: 
Orchidaceae, epiphytes, family size and distribution
Abstract: 
An estimate of the number of species in the Orchidaceae is determined to be 19,128. This number agrees well with that of Dressler (1981) and suggests that ultimately there may be 20,000-23,000 species with an improbably maximum of 25,000. No support is given for the claim that the family contains 35,000 species. Orchid epiphytes (13,962 species) account for 73 percent of the family, and 440 of 725 genera (60.7 percent) contain epiphytes.