Perennial herbs, with a tuberous or fleshy cylindrical woodstock. Stem simple or branched. Leaves compound in various ways, usually palmatisect or palmatipartite, sometimes only stem leaves verticillate, forming an involucre. Flowers solitary or in cymose, umbel-l ike inflorescences, sepals 5-20, petaloid. Stamens numerous. Carpels numerous, arranged in globose heads or cylindrical spikes. Ovule pendulous, seeds with one integument.