Tree, 4-30 m high. Leaves in whorls of (2 or) 3 or 4, coriaceous when dried; petiole 0.6-5.3 cm long; blades obovate, elliptic, or narrowly so, 5.4-26 by 2.1-8 cm, ratio 2.1-5.8, base decurrent onto petiole, margin entire to slightly undulate, apex usually acuminate, sometimes acute or very rarely shallowly retuse; secondary veins 28-45 pairs, straight to rather arcuate ascending near the margin, not reaching the margin, joining, forming a submarginal vein. Inflorescence 1.5-18 cm long, terminal and axillary cymes, in whorls of 2-4, sometimes solitary, congested; peduncle 1-8 cm long. Flowers fragrant, more than 30 on each inflorescence. Sepals ovate, unequal in size, apex acute, thick except along the margin, rough outside, smooth inside. Corolla white, villose inside, rather dense, forming a belt of 1.5 mm wide just below the mouth; tube 3 mm long, tube-calyx ratio 1.5-2, tube-lobes ratio 0.4. Stamens inserted at 1 mm below the mouth, 0.7 of the length of the corolla tube; filaments 0.4 mm long. Pistil 2.5 mm long; ovary subglobose, of 2 distinctly separated carpels, apex rounded and abruptly narrowed at base of style; style 1 mm long, not split at base. Fruit composed of 2 separate mericarps; mericarps ovoid, ellipsoid or subglobose, base rounded to blunt, apex apiculate, acumen often strongly curled, verrucose when dried; endocarps split into fibres penetrating the mesocarps; fibres rather thin and slender, not forming hard thick pointed ends. Seeds 2 at either placenta.
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