Cauline leaves (at least some) 3-lobed. Discs 10-15 mm diam. Ray laminae 8-17 mm. 2n = 38, ca. 57, 57. Flowering Jul-Oct. Mesic to wet woodlands, thickets, pastures, roadsides, meadows; 20-300 m; Ont., Que.; Ala., Ark., Colo., Conn., Del., Ga., Ill., Ind., Iowa, Kans., Ky., La., Md., Mass., Mich., Minn., Miss., Mo., Nebr., N.J., N.Y., N.C., Ohio, Okla., Pa., Tenn., Tex., Utah, Vt., Va., W.Va., Wis. Variety triloba is introduced in Canada.