Oxalis, including: Oca, Oxalis Oregana, Common Wood Sorrel, Oxalis Corniculata, Scurvy-grass Sorrel, Oxalis Pes-caprae, Oxalis Violacea, Oxalis ... Oxalis Pennelliana, Oxalis Rufescens

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More info: 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.