Convolvulus sepium Linnaeus var. americanus Sims, Bot. Mag. 19: plate 732. 1804; C. americanus (Sims) J. W. Loudon

Herbage usually pubescent to tomentose, sometimes glabrate or glabrous. Leaf blades ovate, basal lobes usually rounded or 1-pointed and not spreading, sometimes slightly spreading and 2-pointed, basal sinus acute. Bracts distinct from sepals, 16–25 × 10–20 mm, proximally flat or keeled, apex obtuse to rounded. Flowers: corolla pink, 45–70 mm; stamens 24–32 mm.

Flowering Jul–Oct. Disturbed sites, grassy banks, rocky shores, salt marshes; St. Pierre and Miquelon; N.B., Nfld. and Labr. (Nfld.), N.S., Ont., P.E.I., Que.; Conn., Del., Ill., Ind., Maine, Md., Mass., Mich., N.H., N.J., N.Y., N.C., Ohio, Pa., R.I., Vt., Va., Wis.; South America (Argentina, Uruguay); s Africa (Cape Peninsula, extinct?); Atlantic Islands (Azores, Tristan da Cunha).