Branches lenticellate or not; branchlets glabrous to minutely and sparsely puberulent. Leaves opposite; petiole 3-12 mm long; blade coriaceous, ovate to broad elliptic, 2.3-9 by 1.3-5.5 cm, 1.3-4.1 times as long as wide, apex acuminate, base rounded, glabrous, sometimes with few hairs on petiole, 5-8 pairs of secondary veins, not particularly distinct from tertiary venation, tertiary venation prominent above. Inflorescence of axillary cymes, 2-4 cm long, minutely and sparsely puberulent; peduncles 0.6-2 cm long; petiole 3-5.8 mm long. Sepals ovate, imbricate, 1.7-2.1 by 0.8-1.2 mm, 1.4-2.3 times as long as wide, apex acute to obtuse, glabrous except for ciliate margin. Corolla yellow, buds with an acuminate head, lobes clearly overlapping, open corolla salverform; tube 2.9-4.1 mm long, 1.4-2.3 times as long as sepals, 1-1.4 times as long as lobes; lobes ovate to oblong, apex rounded to obtuse, 2.2-3.3 by 1.5-1.8 mm; glabrous outside, densely pubescent at top of tube and behind anthers inside. Stamens inserted at 1.9-2.2 mm from corolla base which is 0.5-0.6 of tube length; filaments geniculate, 0.2-0.4 mm long; anthers narrowly triangular, tails narrow, 3.5-4.1 by 0.6-0.7 mm, 5-6.8 times as long as wide. Disk annular, surrounding ovary, 5-crenate, 0.8-1 mm long. Ovary 0.6-0.7 mm long; style 2-3.1 mm long; style head 0.9-1.1 mm long. Fruit (immature) fusiform, smooth.
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