Stout biennial, 3–8 dm, commonly with many opposite branches at and beyond the middle, sharply wing-angled; lvs ovate or lance-ovate, 1–4 cm, broadly rounded or subcordate at base, 3–7-nerved; pedicels 5–30 mm, the conspicuous wings continuing upon the base of the cal; cal-lobes narrowly oblong to oblanceolate, 6–15 mm, usually at least 1.5 mm wide; cor pink (white) with a greenish center, the lobes 1–2 cm, oblanceolate to obovate; 2n=38. In a wide range of habitats, sometimes weedy; Conn. to s. Mich. and Kans., s. to Fla. and Tex. July, Aug.