Caulophyllum thalictroides, blue cohosh a species of Caulophyllum (family Berberidaceae), also called squaw root or papoose root, is a flowering plant in the Berberidaceae (barberry) family. It is a medium-tall perennial with blue berry-like fruits and bluish-green foliage.
From the single stalk rising from the ground, there is a single, large, three-branched leaf plus a fruiting stalk. The bluish-green leaflets are tulip-shaped, entire at the base, but serrate at the tip. Its species name, thalictroides, comes from the similarity between the large highly divided, multiple-compound leaves of Meadow-rue (Thalictrum) and those of Blue Cohosh.