Perennial herbs, often stoloniferous. Leaves mostly radical, alternate, petiolate, stipulate. Lamina 3-foliolate or occasionally pinnately 5-foliolate. Inflorescence erect, terminal, cymose, few flowered, rarely solitary. Flowers bisexual (or sometimes unisexual on polygamo-dioecious plants). Hypanthium obconic, flattened to slightly concave. Epicalyx 5-lobed, alternating with and smaller than sepals. Sepals 5, valvate, persistent. Petals 5, white, rarely yellow. Stamens numerous. Carpels numerous, free, borne on a convex receptacle, ovule epitropous. Fruit a glandetum formed from enlarged, fleshy receptacle. Achenes numerous, brownish, seated in pits on surface of glandetum.