Section
Corniculatae
Oxalis pilosa. Photo: (c) Carol Blaney, some rights reserved (CC BY-NC)
Oxalis /ˈɒksəlɪs/ is a large genus of flowering plants in the wood-sorrel family Oxalidaceae comprising about 570 species. The genus occurs throughout most of the world, except for the polar areas; species diversity is particularly rich in tropical Brazil, Mexico and South Africa.