15. Calystegia hederacea Wallich in W. Roxburgh, Fl. Ind. 2: 94. 1824.
[I W]
Convolvulus wallichianus Sprengel
Perennials, rhizomatous. Herbage glabrous. Stems initially erect, usually becoming procumbent or weakly twining-climbing, to 80 cm. Leaves: blade triangular to triangular-hastate, 20–80 × 20–70 mm, base lobed, lobes 2(–3)-pointed, basal sinus quadrate, rounded, or broadly V-shaped, apex ± acute. Bracts immediately subtending sepals, lance-ovate to ovate, 7–14(–18) × (4–)6–10(–12) mm, proximally flat, apex acute to subobtuse. Flowers: sepals 5–8(–12) mm; corolla usually pale pink, sometimes purple or white, 21–32(–35) mm. 2n = 22.
Flowering May–Jul. Abandoned plantings, disturbed sites; introduced; Conn., Idaho, Ill., Ind., Kans., Ky., La., Maine, Md., Mass., Mich., Mo., N.H., N.J., N.Y., N.C., Ohio, Pa., Tenn., Vt., Va., Wis.; Asia.
Calystegia hederacea is easily recognized by its usually procumbent habit, ivylike leaves, and relatively small bracts and flowers.
