This is Anemone patens var. wolfgangiana, also known as Pasque Flower, Prairie Crocus, May Day Flower, Meadow Anemone, Easter Flower, Wind Flower, and Crocus Anemone. This is the state plant of South Dakota. Growing up to 6 inches tall this plant likes to live in full sun to partial shade. From late Winter to the middle of Summer this plant has purple blossoms. USDA Hardiness Zones 4 to 9.