Overview
The Oxalidaceae, or wood sorrel family, are a small family of eight genera of herbaceous plants, shrubs and small trees, with the great majority of the 900 species in the genus Oxalis (wood sorrels). Members of this family typically have divided leaves, the leaflets showing "sleep movements", spreading open in light and closing in darkness.
The genus Averrhoa of which starfruit is a member, is often included in this family, but some botanists put it in a separate family Averrhoaceae.
- Oxalidaceae and Averrhoaceae in L. Watson and M.J. Dallwitz (1992 onwards). The families of flowering plants: descriptions, illustrations, identification, information retrieval. http://delta-intkey.com
Media related to Oxalidaceae at Wikimedia Commons 
Data related to Oxalidaceae at Wikispecies
Taxonomy
The Family Oxalidaceae is further organized into finer groupings including:
- Genus (18): Acetosella · Averrhoites · Biophytum · Ceratoxalis · Connaropsis · Dapania · Ionoxalis · Lotoxalis · Monoxalis · Otoxalis · Oxalis · Oxalix · Oxys · Petrocallis · Sarcotheca · Sassia · Trifoliada · Xanthoxalis
- Species: ZipcodeZoo has pages for 2,260 species, subspecies, varieties, forms, and cultivars in the Family Oxalidaceae.
Genera
Acetosella
Averrhoites
Biophytum
Biophytum is a genus of about 50 species of annual and perennial herbaceous plants in the family Oxalidaceae. It is found in tropical and subtropical areas worldwide. The annual is a traditional medicine in Nepal. Biophytum petersianum (also known as Biophytum umbraculum) is a medicinal plant in Mali. [more]
Ceratoxalis
Connaropsis
Dapania
Ionoxalis
Lotoxalis
Monoxalis
Otoxalis
Oxalis
Oxalis is the largest genus in the wood sorrel family Oxalidaceae. Of the approximately 900 known species in the Oxalidaceae, 800 belong to Oxalis. Many of the species are known as Wood Sorrel or Woodsorrel. The genus occurs throughout most of the world, except for the polar areas; species diversity is particularly rich in tropical Brazil and Mexico and in South Africa. [more]
Oxalix
Oxys
Petrocallis
Sarcotheca
Sarcotheca is a genus of in family Oxalidaceae. [more]
Sassia
Trifoliada
Xanthoxalis
At least 39 species and subspecies belong to the Genus Xanthoxalis.
More info about the Genus Xanthoxalis may be found here.
Sources
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