Heynea trijuga Roxb.

Trees 5-10 m tall. Old branches glabrous, young parts yellow pubescent, black or dark brown when dry, with sparse lenticels. Leaves alternate, usually 20-36 cm; rachis cylindric or ridged, glabrous; leaflets 7 or 9, opposite; leaflet blades lanceolate, ovate, or oblong-elliptic, (5-)8-16 × (2.5-)3.5-5(-7) cm, membranous, abaxially pale and glabrous or yellow pubescent, adaxially glabrous, secondary veins 8-12 on each side of midvein, base oblique, margin entire, apex acuminate. Thyrses axillary, slightly shorter than leaves; peduncle pubescent. Flowers 3-4 mm. Pedicel ± as long as flowers, thin, pubescent or glabrous. Calyx 4- or 5-lobed; lobes orbicular to obtusely triangular, outside pubescent or glabrous. Petals 4 or 5, white or creamy white, oblong-elliptic, outside pubescent or glabrous. Filament tube 10-parted to below middle, pubescent or glabrous, segments inside covered with hard trichomes, tips 2-cleft; anthers 8-10, inserted between 2 lobes of filament tips. Ovary spherical, glabrous; style ± as long as filament tube; stigma spherical, tip 2-cleft. Capsule ellipsoid and with a carpopodium, (1.5-)2.5-3 × 1-2.5 cm, glabrous, 1-seeded. Seed black when dry, with a white aril. Fl. Apr-Jun, fr. May-Jun and Nov-Dec.

Guangdong, Guangxi, Gui-zhou, Hainan, Yunnan [Bhutan, India, Indonesia, Laos, Nepal, Philippines, Thailand, Vietnam].

Forests in hilly regions; 200-1300 m.

Heynea trijuga var. microcarpa Pierre; H. trijuga var. pilosula C. Candolle; Trichilia connaroides (Wight & Arnott) Bentvelzen; T. connaroides var. microcarpa (Pierre) Bentvelzen; Walsura trijuga (Roxburgh) Kurz; W. trijuga var. microcarpa (Pierre) S. Y. Hu; Zanthoxylum connaroides Wight & Arnott.