Perennial from a tuberous root. Stems prostrate or twining, slender up to 2·5 m. long, densely bristly pubescent. Leaf lamina ovate-cordate to subcircular-reniform in outline, 2–6·5 × 1·5–5 cm., entire or 3-lobed, acute or acuminate at the apex, thin, green, appressed pilose above, with dense to very sparse and almost non exsistent traces of white cottony tomentum beneath; veins yellow-bristly beneath; mid-lobe elliptic and mucronulate, basal lobes rounded, all constricted at the base and more or less crenate; petiole 1·5–5 cm. long, slender, hairy as in the stems. Flowers few- to many, in lax, rarely rather dense, cymes, very rarely solitary; peduncle up to 7 cm. long, slender, pilose like the stems and petioles; bracteoles linear-lanceolate, 5–11 mm. long, acuminate-aristate, pilose or hirsute as are the sepals; cyme branches usually short; pedicels 0–10 mm. long. Sepals linear-lanceolate to lanceolate, very acuminate, 6–18 mm. long, pilose with yellow-bristly hairs; margins glandular. Corolla broadly funnel-shaped, pink or mauve, 4.5–5 cm. long, glabrous or with a few pilose hairs on the well-defined mid-petaline areas; the limb shallowly 5–lobes. Capsule ovoid, glabrous or pubescent. Seeds compressed-globose, yellow-pubescent, also with 2 tufts of long white hairs attached to edges near the apex.