Shrub or tree, 2-10 m high. Branchlets 2-2.5 mm diam., the topmost branchlets rarely winged; wing occurs longitudinally on opposite sides along the length of the branchlets, leaf-like. Leaves in whorls of 2-4, papyraceous when dried; blades obovate, sometimes elliptic, to narrowly so, 7-13.3 by 2.5-5.3 cm, ratio 1.7-3.8, base cuneate, margin entire to undulate, apex cuspidate; secondary veins 25-38 pairs, not reaching the margin, joining, forming a submarginal vein. Inflorescence 3.5-5.5 cm long, axillary cymes, solitary or in whorls of 2 or 3; peduncle 0.6-2(-3.3) cm long, winged; wing occurs longitudinally on opposite sides along the length of the peduncle, leaf-like, asymmetric. Sepals ovate, margin entire, apex rounded, rather thin. Corolla yellow or white, villose inside, rather dense, forming a belt of 2 mm wide just below the insertion of stamens; tube 13 mm long, tube-calyx ratio 6.5, tube-lobes ratio 1.6. Stamens inserted at 4 mm below the mouth, 0.7 of the length of the corolla tube; filaments 0.8 mm long. Pistil 8.5 mm long; ovary ovoid, gradually narrowed at apex towards base of style; style 6.5 mm long, split at base. Fruit apocarpous, composed of 2 separate mericarps; mericarps boat-shape, strongly dorsiventrally compressed, base long cuneate, apex rounded and sometimes abruptly acuminate, acumen tiny, with distinct apical and lateral ridges, longitudinally shallowly grooved along the middle on both dorsal and ventral surfaces; endocarps massive, thick, hard, surrounding 2 spongy cavities of about 0.5-0.9 cm diameter. Seeds 2 at either placenta.
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Trees to 6 m, glabrous. Branchlets subangular, smooth. Leaves opposite or whorled; blade elliptic, 7-20 X 3-5 cm, apex abruptly acuminate. Cymes repeatedly dichasial, ending monochasial, many flowered; peduncle to 3 cm. Pedicel 2-4 mm. Sepals ovate, ca. 2 mm, glabrous, apex rounded. Corolla white, tube ca. 4 mm, as long as lobes. Stamens inserted near mouth of corolla tube. Ovaries distinct, oblong. Drupes 2, bright red, ellipsoid, 2.5-5 X 2-2.5 cm, spreading horizontally. Seeds 2 on each placenta. 2n = 22.
A tree. It grows up to 6-10 m tall. It has white latex. The leaves are oblong or sword shaped. They have a long point at the tip. They are 8-19 cm long by 2-5 cm wide. There are many fine side veins. The leaf stalk is slender. It is 10-18 mm long. The flowers are white. The fruit are in pairs. They are green and turn red when ripe The fruit has many seeds and splits down one side on ripening. It is 2-3 cm long. It is shining and red.
Primary and secondary rain forests; growing on clayey soils; at elevations up to 1,000 metres. Lowland rain forest along rivers, even if temporarily flooded.
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A tropical plant. It is often near seashores and occasionally flooded forests. It grows in the mountains up to 800 m above sea level.
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