Caulophyllum thalictroides

Blue Cohosh is an ephemeral perennial in the Berberidaceae family, usually found in oak filled
woods. Yellow green flowers appear before the leaves have developed in spring. Leaves start out blue-green then become more green as they mature. In late summer, bright blue berries appear. Although ornamental and great wildlife value, the berries are toxic to humans. This plant prefers a shady area and moist, well-drained soils. Blue Cohosh makes a fantastic addition to a shady rain garden.