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It is a creeping or twining plant. The stems can be 1.5-2.5 m long and lie along the ground. The stems are often buried in sand and tufts of leaves are above the ground. The leaves are bright green and 2 cm long by 3 cm wide. They are heart or kidney shaped. The flowers are pale pink and produced in the axils of leaves. They are "morning glory" type flowers, like sweet potato. They are funnel shaped. The flowers open one after another along the stem. The flowers are 3-5 cm long and 1.5 cm across. Flowers last only one day. The fruit are round and 1.5 cm long. The seeds are dark brown and smooth.
Rhizome creeping, branching; stems spreading, branching, up to 5 dm. long, stout, us. nearly glab.; plant forming large patches or low mounds up to ± 2 m. diam. Petioles up to 8 cm. long, rather stout; lamina (1)-2-5 cm. diam., reniform, subfleshy, glossy; sinus broad, shallow. Peduncles solitary, 1-fld, up to 10 cm. long; bracts ovate-cordate, obtuse, hardly = subequal, broad-ovate, obtuse sepals. Corolla 25-40 mm. diam., white to pale pink or purplish. Ovary incompletely 2-loculed; capsule broad-ovoid, apiculate. Seeds dark brown.
Plants glabrous. Stems prostrate, to 1 m, scarcely twining or not. Petiole longer than leaf blade; leaf blade reniform, slightly fleshy, sinus divergent or shortly parallel sided, apex rounded to emarginate, sometimes mucronate. Lower peduncles usually exceeding leaves, upper peduncles often shorter; bracteoles ovate to nearly circular, usually shorter than calyx, apex obtuse or retuse. Corolla pink, 3--5(--5.5) cm. Stamens (1.8--)2.1--2.7(--3) cm; anthers (3--)4--5.5(--6) mm. Fl. May-Jul, fr. Jul-Sep. 2n = 22.
