Alstonia rostrata C.E.C.Fisch.

Tree 8-35 m high, 15-80 cm dbh, sometimes slightly fluted at the base, without buttresses. Bark shallowly and/or irregularly fissured, pale or yellowish brown; inner bark yellow-orange, light brown or straw-coloured, granular, with copious white latex. Branchlets glabrous. Leaves in whorls of 3-4(-6); petiole 8-20(-25) mm long, sometimes with a very small (obscure) intrapetiolar stipule at the base, with deltoid or scale-like colleters in the axils; blade elliptic or narrowly elliptic, rarely ovate or obovate, 4.5-13(-20) by 1.5-5.5 cm, 1.9-4.8 times as long as wide, apex usually abruptly acuminate, up to 12 mm long with a blunt acumen, base obtuse or acute, sometimes rounded, mostly continuing downwards onto the petiole and forming a slightly winged petiole, glabrous on both sides; 23-60 pairs of secondary veins, rather straight, forming an angle of 80-90° with the midrib, 1-3(-5) mm from each other, joining near margin to form a thin submarginal vein; tertiary venation admedial ramified, mostly conspicuous on both sides, descending towards the midrib and more or less parallel with the secondary veins. Inflorescence 2-5 cm long, many-flowered; pedicels (0.5-)1-2 mm long, glabrous or puberulous. Bracts and bracteoles scale-or sepal-like, ovate or subtriangular, up to 1 mm long, curving or not, obtuse or acute, glabrous on both sides, not ciliate, leafy bracts sometimes present. Flowers fragrant. Sepals dark green or pink, sometimes red, connate at the base for 0.2-0.4 mm, ovate or suborbicular, 0.9-1.2(-1.7) by 0.9-1.2(-1.5) mm, erect, rounded, glabrous outside, glabrous or laxly puberulous around the apex inside, ciliate. Corolla lobes sinistrorse; white or pink, 5.5-7 mm long in the mature bud and forming an ovoid head, 1.5-2.5 by 1-1.5 mm; partly puberulous outside (usually on the lobed part); tube 5-6 mm long, 1.5-2 mm wide around the stamens; lobes ovate, 2.3-3 by 1.7-2.5 mm, 1.2-1.4 times as long as wide, pilose inside. Stamens inserted at 3-3.3 mm from the base; anthers ovate or subtriangular, 1-1.2 by 0.35-0.5 mm, obtuse or acute. Pistil 3.2-4 mm long; ovary subglobose, 0.6-0.9 by 0.6-0.9 mm, syncarpous, lobed on top at the insertion of the style, glabrous or minutely hairy, disk-like thickening at the base obscure; style 1.5-2.6 mm long; style head 0.9-1 mm high, with an elongate and robust cleft stigmoid apical part 0.4-0.6 mm high. Fruit solitary, composed of a united pair of follicles, 16-30 cm by 8-12 mm, slightly laterally compressed and with distinct and narrow grooves on both sides on the flattened parts, glabrous, roughly striate and thick-walled. Seeds elliptic or oblong, 9-11 by 2.8-3 mm, glabrous and a tuberculous on both sides (except surrounding the hilum, which is smooth), ends rounded; margin slightly thickened, longest cilia 10-17 mm long.

Evergreen or open degraded forests, at elevations from 500-1,300 metres.

Can be grown by seedlings.