Calystegia sepium var. angulata (Brummitt) N. H. Holmgren; C. sepium var. repens (Linnaeus) A. Gray; Convolvulus repens Linnaeus; C. sepium Linnaeus var. repens (Linnaeus) A. Gray

Herbage glabrous. Leaf blades broadly triangular, basal lobes spreading, ± 2-pointed, basal sinus rounded. Bracts (12–)14–26(–32) × (6–)10–18 mm, proximally keeled. Flowers: corolla white, limb margin rarely pink-tinged, (28–)48–50(–80) mm; stamens (19–)23–30 mm. 2n = 22.

Flowering Jun–Sep. Disturbed sites, edges of marshes, thickets, and woods, hedges, roadsides, stream banks, tidal swamps; 70–2400 m; Alta., B.C., Man., N.B., Ont., Que., Sask.; Ariz., Colo., Conn., D.C., Idaho, Ill., Ind., Iowa, Kans., Maine, Md., Mass., Mich., Minn., Mo., Mont., Nebr., N.H., N.Mex., N.Y., N.Dak., Ohio, Oreg., Pa., R.I., S.Dak., Utah, Vt., Wash., W.Va., Wis., Wyo.