Violet wood axalis (Oxalis violacea)

Violet wood oxalis photograph

Perennial plant to 6 inches tall. Mesic prairies. Blooms in June with light purple, 5-petaled flowers in loose clusters. Leaves are shamrock-shaped with 3 heart-shaped, folded leaflets containing oxalic acid, which gives them a sour taste. High in vitamin A. Used as food by American Indians.