English Lao
Botanical descriptions Habitat and ecology Distribution
| Diagnostic characters : | Deciduous trees with white sap, opposite leaves, densely pubescent below. |
| Habit : | Deciduous tree up to 15 m tall. |
| Trunk & bark : | Bole straight, bark brown, flaky, slightly fissured. |
| Branches and branchlets or twigs : | Twigs terete, glabrous. |
| Exudates : | Exudate white. |
| Leaves : | Leaves simple, opposite, elliptic, below densely pubescent, apex acute, base acute to acuminate, margin entire. Primary vein single, secondary veins oblique 8-15 pairs, tertiary veins reticulate. Stipules absent. |
| Inflorescences or flowers : | Flowers white, arranged in a many-flowered inflorescence, terminal, bisexual, pedicels shorter than 0.5 cm. |
| Fruits : | Fruit a dry follicle, up to 35 cm long, splitting into 2 sections. |
| Seeds : | Seeds many, with a long tuft of hairs at one end. |