Oxalis (American English) or (British English) 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.
Many of the species are known as wood sorrels (sometimes written 'woodsorrels' or 'wood-sorrels') as they have an acidic taste reminiscent of the sorrel proper (Rumex acetosa), which is only ...