inconspicuous, green, 5-merous; buds globose, 1.5-2.2 mm long; calyx lobes imbricate, broadly ovate, acute to rounded at the tip, densely hairy, 1.0-1.5 mm long; corolla lobes imbricate, the lobes ovate, 6-9 mm long, 2.5-3.5 mm wide, acute at the apex, conspicuously pellucid-punctate on the outer surface of the lobes; stamens erect, the filament 1.5-2.0 mm long, the anthers 0.3-0.4 mm long, cordate, lobed at the base to near the middle; ovary enclosed in the multilobed disc, composed of 5 carpels; style 1, cylindric, 1.5-2.0 mm long; stigma 1, capitate. Capsules 5-locular, urceolate, flattened on the top, 1.4-2.0 cm high, 2.0-2.5 cm across at the apex, coriaceous, becoming indurate at maturity, each segment beaked, the beak stout, spreading to slightly recurved, 3-7 mm long; endocarp cartilaginous, light straw colored, 2-winged, the lobes oblong, spreading and rounded at the apex, partly enclosing the seed at the base; seed ovoid to ellipsoid, 9-11 mm long, slightly hooked at the apex, dark brown.
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Shrubs or small trees, 2-5 m high; branches terete, glabrous, grayish brown with scattered, inconspicuous elliptic lenticels. Leaves opposite or ternate, short petiolate, the petioles terete, canaliculate and narrowly winged adaxially, 6-12 mm long, glabrous; lamina elliptic, 16.5-30.0 cm long, 6.3-12.7 cm wide, short to long acuminate at the tip, tapering to a cuneate base, chartaceous to slightly coriaceous with numerous tiny glands on both the surfaces, glabrous, pinnately veined, the veins 9-12 pairs, spreading, anastomosing. Inflorescence a reduced, few-flowered panicle, terminal, pedunculate, the peduncle 0.6-2.5 cm long, finely striate, bracteate, the bracts ovate, acute, 2-4 mm long. Flowers small,