OXALIS
Oxalis
Oxalis is by far the largest genus in the wood-sorrel family Oxalidaceae: of the approximately 900 known species in the Oxalidaceae, 800 belong here. 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.The above text is a snippet from Wikipedia: Oxalis
and as such is available under the Creative Commons Attribution/Share-Alike License.