English Lao
Botanical descriptions Habitat and ecology Distribution
| Diagnostic characters : | Leaf margin distinctly and sharply toothed except near the base. Fruits densely clustered and completely covered by long slender straight sharp spines of different lengths. |
| Habit : | Evergreen tree up to 20 m height. Branches ascending, young shoots densely orange-brown hairy. |
| Trunk & bark : | Bole straight. Bark brown or silvery grey, more or less fissured, inner bark fibrous, pale orange soon darkening. |
| Branches and branchlets or twigs : | Twigs terete and tomentously-hairy when young, becoming glabrous. |
| Exudates : | Exudate absent. |
| Leaves : | Leaves simple, alternate, 11 -15 by 3.5 - 7 cm, elliptic - oblong, tip acute, base acute, margin distinctly and quite sharply dentate except near base, glabrous and shiny above, densely hairy with minute creamy-orange hairs below. Midrib flat above, primary vein single, secondary veins oblique to the midrib, widely parallel, tertiary veins oblique. Stipules deciduous. |
| Inflorescences or flowers : | Flowers unisexual on the same tree. |
| Fruits : | Fruit a nearly closed spiny acorn 2.5-4 cm in length, orange-brown, dehiscent. |
| Seeds : | 3-4 seeds. |