Stems erect or nearly erect, never rooting at nodes. Flowers: sepals spreading or reflexed from base. Achene margin 0.1-0.2 mm broad. 2 n = 32. Flowering late winter-fall (Mar-Oct). Dry woods, grasslands, roadbanks; 0-1200 m; Ont.; Ala., Ark., Conn., Del., D.C., Ga., Ill., Ind., Kans., Ky., Md., Mass., Mich., Miss., Mo., N.J., N.Y., N.C., Ohio, Okla., Pa., S.C., Tenn., Vt., Va., W.Va.