Stems erect or ascending, sometimes the tip of the stem feebly twining, 5 to 15 inches high, hairy or in late summer becoming nearly smooth. Leaves alternate, oval, short petioled or the upper leaves sessile, usually blunt or but slightly pointed at the apex, somewhat heart-shaped or rounded at the base, 1 to 2 inches long, one-half to 11/2 inches wide. Flowers white, open funnelform, about 2 inches long, solitary on long stalks from the axils of the middle or lower leaves; the calyx inclosed by two oval bracts.
Memoir 15 N. Y. State Museum
B. Upright Or Low Bindweed - Convolvulus spithamaeus