Perennial; stems prostrate or twining, densely bristly pubescent. Leaves ovate, 6.5–17 cm. long, 5–18 cm. wide, acute or acuminate at the apex, cordate at the base, entire or 3-lobed, with the mid-lobe elliptic, thin, green, but adpressedly pilose above, with dense to very sparse and almost nonexistent traces of white-cottony tomentum beneath; veins yellow-bristly beneath; petiole 6–25 cm. long. Flowers few to many, in lax, rarely rather dense, cymes, very rarely solitary; peduncle up to 23 cm. long; secondary branches up to 9 cm., often forked several times; bracts deltoid, 5 mm. long, 2.5 mm. wide. Sepals linear-lanceolate to lanceolate, 6–18 mm. long, 2–3 mm. wide, pilose with yellow-bristly hairs; margins glandular. Corolla pink or mauve, broadly funnel-shaped; tube narrow below, (2.5–)4.5–5.3 cm. long. Capsule ovoid, 6–9 mm. long, glabrous or pubescent. Seeds compressed-globose, 3.5 mm. long, yellow-pubescent, also with a small tuft of white hairs 7–8 mm. long.