English Lao
Botanical descriptions Habitat and ecology Distribution
| Diagnostic characters : | Young twig covered by reddish brown hairs and then becoming glabrous. Lower leaflets pairs small than the other pairs. Leaf stalk glabrescent, regularly swollen at base. White aromatic resinous sap. |
| Habit : | Large tree up to 30 m high, 80 cm in diameter. Branches ascending to main trunk. |
| Trunk & bark : | Trunk cylindrical, straight and late branched. Bark light brown, scaly. Outer bark thin, inner bark pinkish brown. |
| Branches and branchlets or twigs : | Twigs terete, covered by reddish brown hairs when young, becoming glabrous when mature. With many lenticels. |
| Exudates : | White resinous and sticky sap, aromatic. |
| Leaves : | Leaves compound imparipinnate, alternate spiral and clustered at tip of branches, leaflets opposite, 7-14 by 5-7 cm sized, elliptic or ovate to oblong-ovate, apex acuminate, base obtuse slightly oblique, margin entire, basal pairs smaller than the other, rachis 26-28 cm long. Midrib flat above, primary vein single, secondary veins oblique to the midrib, widely parallel, tertiary veins oblique. Rachis 26-28 cm long. Stipule awl-shaped, hairy, soon caducous. |
| Inflorescences or flowers : | Flowers yellowish-green, grouped in axillary raceme, flower polygamous. |
| Fruits : | Fruit is a drupe, 4.5 by 2-2.5 cm sized, stone hard, woody, with 6 ribs on the surface, rounded at both ends, yellowish green when ripe; calyx persistent in fruit. |
| Seeds : | 3 seeds. |