Shrubs climbing. Stems terete, striate, densely gray-yellow villous. Petiole 3-8 cm, densely villous; leaf blade ovate to ovate-cordate, 6-16 × 5-12 cm, papery, abaxially densely gray-yellow villous, adaxially sparsely gray strigose, veins palmate, 2-3 pairs from base, base deeply cordate or auriculate, sinus 1-2.5 cm deep, apex acute or acuminate. Flowers axillary, solitary or paired. Peduncle slightly pendulous, 3-8 cm, densely villous; bractlets ovate, ca. 1.5 × 1 cm, inserted near base of peduncle. Calyx yellowish with purple veins, 4-5 cm; tube geniculately curved, abaxially villous on tube; basal portion of tube 20-30 × 8-10 mm; limb discoid-subrotund, 3-3.5 cm in diam., shallowly 3-lobed; lobes broadly ovate, recurved. Anthers oblong, ca. 2 mm. Gynostemium 3-lobed. Capsule cylindric, 6-8 × 2-3.5 cm, dehiscing basipetally. Seeds narrowly ovoid, 5-6 × 3-4 mm. Fl. May-Jun, fr. Aug-Oct.
Forests, thickets, along streams; at elevations from 2,000-3,200 metres.
Can be grown by cuttings or seedlings. Seeds needs soaking.
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