Woody climber. Branchlets minutely and densely puberulent, glabrescent with age. Leaves: petiole 15-21 mm long, densely puberulent; blade ovate to elliptic, 6-18.9 by 3.8-8.2 cm, 1.5-2.6 times as long as wide, apex short acuminate, base rounded to obtuse, glabrous above, puberulent beneath, more densely so on midrib and veins, punctate beneath, 18-24 pairs of secondary veins, with weaker interstitial veins, anastomosing into an intramarginal vein. Inflorescence a terminal panicle, flowers densely clustered, 9.5-14.4 cm long; peduncle 2.5-9.5 cm long, minutely and densely puberulent; pedicels 1.5-2 mm long, minutely and densely puberulent, bracteoles absent. Calyx 1-2.2 mm long, connate at base, lobes c. 0.7-1 by 1-1.7 mm, 0.6-0.7 times as long as wide, apex rounded, densely pubescent. Corolla (slightly immature) yellow or purple; tube 8-9 mm long, c. 4.1 times as long as calyx, c. 1.5 times as long as lobes, densely pubescent outside except at very base, pubescent inside only below stamens; lobes falcate, c. 6 by 2.2 mm, apex acuminate, pubescent outside on parts of lobes exposed in bud, glabrous inside. Stamens inserted at 2.3-2.7 mm from corolla base which is c. 0.3 of tube length; filaments 0.6-0.8 mm long; anthers 1.2 by 0.4-0.5 mm. Ovary 1.3-1.4 mm long; style and style head 1.2-1.7 mm long. Fruit narrowly fusiform, c. 9.4 by 1.4 cm (immature).
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