Trees to 30 m tall; trunk to 90 cm d.b.h. Bark grayish brown, longitudinally scaly. Leaves 26-66 cm or more; petiole 6-11 cm, pilose; rachis pilose; leaflets usually 5-11 pairs; petiolules 3-9 mm, pilose; leaflet blades ovate-lanceolate to lanceolate, 10-22 × 2.9-9 cm, glabrous to glabrescent but midveins and main veins moderately to densely pilose, base asymmetric, margin entire or sinuate, apex acute to acuminate. Inflorescences to 60 cm or sometimes more, pendent; rachis dark grayish brown, often densely villous-pilose with spreading simple trichomes. Flower buds distinctly conical, drying black. Flowers ca. 4.4 mm. Pedicel dark grayish brown, 0.5-0.8 mm. Calyx cup-shaped, 0.8-1.1 mm, outside pilose; sepals spatulate, 0.3-0.9 × ca. 1 mm, margins ciliate. Petals pink, red, or purple, obpyriform, ca. 5 × 2.5 mm, outside glabrous, margin not ciliate. Androgynophore ca. 4.8 mm; filaments ca. 2 mm (male flowers) or ca. 2.1 mm (female flowers), glabrous; anthers of male flowers 0.7-0.9 × ca. 0.5 mm, exserted beyond petals and somewhat versatile, apex apiculate; antherodes of female flowers somewhat sagittate, ca. 0.5 × 0.2-0.3 mm, apex apiculate. Disk dark grayish brown, 2.2-2.3 mm in diam., densely villous with long brown uniseriate trichomes (often more than 1 mm) clumping and adhering to style in long strands. Ovary dark grayish brown, ca. 3.2 mm in diam., densely villous as disk, with to 5 ovules per locule; style 1.5-2 × ca. 0.5 mm (male) but shorter in female flowers, glabrous; stylehead clavate to discoid, 0.7-0.8 mm in diam. (male). Capsule elliptic, (2.2-)3-4 cm; columella (1.8-)2.2-4 × 1-1.2 cm, concave; valves dark yellow, brown, or reddish brown, 1.4-2.6 × 0.7-0.9 cm, verrucose with large prominent rusty lenticels, 0.6-0.9(-2.3) mm in diam., distributed evenly or becoming denser and smaller toward valve ends. Seeds 1.5-2.6 cm × 3-5.5 mm, winged at both ends; seed body 0.8-1.4 cm × 2-3 mm. Fl. Jun-Jul, fr. Sep-Dec.
Dense forests, mixed woods, valleys, streamsides, often in moist habitats; at elevations from 300-1,900 metres in China.
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