| wood-sorrel (Oxalis spp.) | 
       UWSP Common Plants of Wisconsin  | 
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       wood-sorrel (Oxalis spp.; WOOD-SORREL FAMILY [Oxalidaceae]) Low, trailing or erect herbs with small 5-petaled yellow, white, pink, or purple flowers. Leaves compound, with 3 heart-shaped leaflets. Oxalic acid, which gets its name from this family, gives the leaves a sour taste. Oxalis corniculata is an abundant weed in Wisconsin flower beds. Other species range from open ground to shady woods, with flowering time dependent on the species. [094] 
 
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