Pantropical, of both humid and arid regions, with few temperate outliers in Europe, Asia, and North America.
Genera (3–)7(–more than 20), species ca. 650 (1 genus, 6 species in the flora; 4 species introduced)
Circumscription of the Dioscoreaceae remains controversial. A strict interpretation of the family, adhering to the original taxonomic concept of R. Brown, would include only Dioscorea Linnaeus (ca. 600 species), Tamus Linnaeus (5 species, Mediterranean), and Rajania Linnaeus (25 species, West Indies); recent systematic studies by L. R. Caddick et al. (2000) portray Dioscorea as subsuming the latter two genera. In its broad sense (I. H. Burkill 1960; L. R. Caddick et al. 2000; R. Knuth 1924), the family includes the bisexual genera Avetra H. Perrier (1 species, Madagascar), Trichopus Gaertner (1 species, Indo-Malaysia), and Stenomeris Planchon (2 species, Malaysia), each of which has also been recognized at the family level (R. M. T. Dahlgren et al. 1985; J. Hutchinson 1973; A. L. Takhtajan 1997). Tacca J. R. Forster & G. Forster (10 species, Malaysia; Taccaceae) is closely allied with Avetra and Trichopus, (L. R. Caddick et al. 2000) and the broadest interpretation of the Dioscoreaceae (adopted here) includes Tacca as well. Only Dioscorea is represented in the flora.
Genera (3–)7(–more than 20), species ca. 650 (1 genus, 6 species in the flora
|Author||Lauren Raz +|
|Common name||Yam Family +|
|Illustrator||John Myers +|
|Reference||ayensu1972a +, bouman1995a +, burkill1960a +, caddick1998a +, caddick2000a +, coursey1967a +, huber1998a +, knuth1924a +, queva1894a + and shehbaz1989a +|
|Taxon name||Dioscoreaceae +|
|Taxon rank||family +|
|Volume||Volume 26 +|