Lianas; stems terete, angled, light brown. Leaves ovate, elliptic to obovate, 7-15 cm long, the base cuneate to + rounded, the apex shortly acuminate to ob-tuse, coriaceous, with an obvious raised, rugose pattern below between the sec-ondary veins, dull above, glabrescent. Inflorescences terminal, paniculate-thyrsiform, covered with reddish glandular trichomes; bracts triangular, ca-ducous, densely covered with peltate glandular trichomes. Flowers with the pedicels 3-4 mm long; sepals ovate to broadly ovate, 7-8 mm long, coriaceous, the external lobes with reddish peltate glandular trichomes, the inner with ap-pressed trichomes or glabrous; corolla violet to pale lilac, 25-30(-37) mm long. Fruits ellipsoid to broadly ellipsoid, 17-25 mm in diameter, sulcate with 16-22 sulcae when dry, yellow turning light to dark brown; seeds ellipsoid to ovoid, 15-17 mm long, 9-10 mm in diameter.
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