Leaves: petioles 3-12+ cm, blades 10-35(-60+) × 10-35+ cm, larger usually 3-5-lobed. Ray laminae 12-30+ mm. Cypselae 5-6 mm. 2n = 32. Flowering Jun-Aug(-Oct). Thickets, forest margins, often wet sites; 10-300+ m; Ala., Ark., Del., D.C., Fla., Ga., Ill., Ind., Kans., Ky., La., Md., Mich., Miss., Mo., N.J., N.Y., N.C., Ohio, Okla., Pa., S.C., Tenn., Tex., Va., W.Va.; introduced in Bermuda. B. L. Turner (1988) included types of Smallanthusuvedalia and S. maculatus (Cavanilles) H. Robinson within a single species circumscription. If that circumscription is accepted, the range of S. uvedalia extends through eastern Mexico and Central America to Panama.
