English Lao
Botanical descriptions Habitat and ecology Distribution
| Diagnostic characters : | Young leaves pinkish or mauve with golden brown hairs, mature leaves sharply toothed in upper leaf only. Fruits acorn shortly and densely clustered, cup covering half of nut, nut flattened on top with short tip. |
| Habit : | Deciduous tree, 15 – 40 m tall, branches ascending. Presence of buttresses. |
| Trunk & bark : | Bark dark brown to almost black, lenticellate, deeply fissured. Inner bark reddish, wood pale yellow. |
| Branches and branchlets or twigs : | Twigs terete, puberulous with yellowish brown hairs when young, becoming glabrous, dark brown. |
| Exudates : | Exudate absent. |
| Leaves : | Leaves simple alternate and spiral, 9 - 24 by 3.5 - 8 cm, narrowly ovate, elliptic oblong, apex acute or obtuse, base attenuate or rounded, slightly asymmetric, margin sharply dentate in upper half, coriaceous, below tomentose. Midrib flat above, primary vein single, secondary veins oblique to the midrib, widely parallel, tertiary veins oblique. Petiole hairy, stipules, free hairy. |
| Inflorescences or flowers : | Flowers small, greenish, grouped in clusters of catkins. |
| Fruits : | Fruits acorn in short and dense clusters, 1.5-2 by 2-3 cm, smooth. |
| Seeds : | Nut with a short pedicel. |