Liane with terete, hollow stems covered with adpressed bristly pubescence.. Leaf-blade elliptic-rhomboidal or oblong, 7–15.5 cm. long, 3.5–7 cm. wide, acute and aristate at the apex, narrowed but ± rounded at the base, glabrous above, sparsely adpressed pilose (densely so when very young) beneath; petiole 3 cm. long, bristly-pubescent.. Flowers several in dense cymes; peduncle 9–17 cm. long; bracts 1.9 cm. long, 0.5 cm. wide, spathulate or linear, acuminate; or inflorescences branched and lax with secondary peduncles 0.5–5 cm. long.. Sepals lanceolate, 1.0–1.3 cm. long, 3–5 mm. wide, outer densely covered with adpressed bristly pubescence.. Corolla purple, pink or white, funnel-shaped, 5–6 cm. long; midpetaline areas sparsely hairy.. Capsule ovoid, obtuse, 1.5 cm. long, 3-valved, with persistent reflexed sepals.. Seeds 3, compressed-ovoid, 6 mm. long, very dark brown, densely covered with brown hairs about 1 cm. long.