Cardamine concatenata
Cardamine concatenata, the cutleaved toothwort, crow's toes, pepper root or purple-flowered toothwort, is a flowering plant in Brassicaceae. It owes its name to the tooth-like appearance of its rhizome. It is a perennial woodland wildflower native to eastern North America. It is considered a spring ephemeral and blooms in March, April, and/or May. Description. The vegetative parts of this plant, which can reach 20–40 cm, arise from a segmented rhizome. The leaves are on long petioles, deeply and palmately dissected into five segments with large "teeth" on the margins. The white to pinkish flowers are  held above the foliage in a spike. Fruit is an elongated pod which can be up to 4 cm long. Its native habitats include rich woods, wooded bottomlands, limestone outcrops, and rocky banks and bluffs. Uses. The roots can be washed, chopped and ground in vinegar to be used as a horseradish substitute.