Blue cohosh (Caulophyllum thalictroides) a species of Caulophyllum and family Berberidaceae, also called squaw root (which often is used for the parasitic flowering plant, Conopholis americana) 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. It was used as a medicinal herb by American Indians, and can also be used as a dietary supplement that can induce labour, regulate menstrual flow, suppress menstruation, and ease the pain and difficulty that accompany childbirth. Many Native American tribes and later European herpetologists and mid-wives would use this herb in conjunction with other herbs and fluids for abortive and contraceptive purposes. As such, this herb should not be taken during pregnancy.