English Lao
Botanical descriptions Habitat and ecology Distribution
| Diagnostic characters : | Petals contorted, strong sweet smell. Presence of reddish hairs on petiole, peduncle and pedicel. |
| Habit : | Evergreen tree up to 30 m high, 40 cm in diameter, branches ascending and horizontal to main trunk. Sapwood whitish grey while heartwood brownish. |
| Trunk & bark : | Trunk straight. Bark smooth, slightly hooped, not lenticellate, pustular and greyish. |
| Branches and branchlets or twigs : | Branchlets and twigs terete, tomentose with rough red brown hairs when young. |
| Exudates : | Exudates resinous, white. . |
| Leaves : | Leaves simple alternate and spiral, 9-11 by 3-7.5 cm, elliptic-oblong, apex obtuse or shortly acuminate, attenuate at base, margin entire, blade lathery, glabrous. Midrib raised above, primary vein single, secondary veins oblique to the midrib, widely parallel, tertiary veins finely reticulate. Stipules present, triangular, caducous leaving a small scar. Petiole tomentose with reddish hairs. |
| Inflorescences or flowers : | Flowers arranged in terminal and axillary panicle, flowers densely hairy. Flowers creamish-white, petals contorted, with strong sweet smell. Peduncle and pedicel tomentose with reddish hairs. |
| Fruits : | Fruit is a winged nut, 0.8 cm in diameter, globose or conical, reddish green, with 2 big wings obtuse to rounded at tip and 3 small wings four times shorter. |
| Seeds : | Seed 1. |