Woody climber. Branchlets glabrous; lenticellate. Leaves: petiole 0.5-1.1 cm long; blade 4.5-7.7 by 1.7-3.5 cm, 1.9-2.9 times as long as wide, elliptic or ovate, apex acuminate, base acute to cuneate, subcoriaceous or coriaceous, shiny above, dull beneath, glabrous, 11-18 pairs of secondary veins at 65-75°, not very distinct from veins, reaching margin, with 1 or 2 intercalated veins and also oblique veins almost perpendicular to the midrib. Inflorescence axillary or terminal; the axis as long as or longer than subtending petiole, to 2 cm long; 5-12 flowers per inflorescence; axes sparsely and minutely brown puberulent; pedicel 0.5-1.5 mm long. Sepals ovate, apex rounded, 1-1.2 mm long, lobes 0.7-0.9 by 0.7-1.2 mm, 0.75-1 times as long as wide; glabrous, ciliate. Corolla tube inflated, 1.3-3 mm long, glabrous outside and inside; lobes 1.2-2.7 mm long, ovate or elliptic, glabrous. Stamen insertion at 1.5-1.8 mm from corolla base which is 0.5-0.72 of tube length; filaments 0.5 mm long; anthers 0.5-0.7 by 0.3-0.4 mm. Ovary 0.6-1 mm long; the style 0.8-1 mm long, not impressed on ovary; style head 0.1 mm long, apex 0.1-0.2 mm long. Fruit unknown.
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