Shrubs climbing. Stems terete, striate, densely white villous. Petiole 6-8 cm, villous; leaf blade cordate to orbicular, 15-29 × 13-28 cm, leathery, both surfaces white villous, adaxially glabrescent, veins palmate, 2-3 pairs from base, base cordate, sinus 1-4.5 cm deep, apex obtuse or acute. Flowers axillary, solitary or paired. Peduncle pendulous, 1.5-3 cm, glabrous; bractlets ovate-cordate or cordate, ca. 1 cm, inserted below middle of peduncle. Calyx limb purple, 4.5-5.5 cm; tube horseshoe-shaped, abaxially white hirsute; basal portion of tube 20-25 × 10-12 mm; limb discoid, 4-6 cm in diam., 3-lobed; lobes broadly deltoid. Anthers oblong, 2-3 mm. Gynostemium 3-lobed. Capsule narrowly cylindric, 9-11 × 3-4 cm, dehiscing basipetally. Seeds deltoid-cordiform or cordiform, 6-7 × 6-7 mm, both surfaces slightly plano-convex, verrucose. Fl. Jun-Jul, fr. Aug-Sep.
Can be grown by cuttings or seedlings. Seeds needs soaking.
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