English Lao
Botanical descriptions Habitat and ecology Distribution
| Diagnostic characters : | Deciduous trees. Twigs quadrangular, buds black. Leaves imparipinnate, Leaves and leaflets opposite, 3 pairs leaflets, margin dentate. Inflorescence terminal, flowers white, unisexual, male and female on different trees. Fruit a winged samara. |
| Habit : | Briefly deciduous tree up to 25 m tall. |
| Trunk & bark : | Bole straight, sometimes leaning, bark dark brown, deeply fissured. |
| Branches and branchlets or twigs : | Twigs quadrangular, glabrous, thickened at nodes. |
| Exudates : | Exudate absent. |
| Leaves : | Leaves compound, opposite, imparipinnate, leaflets ovate, apex acuminate to caudate, base acute, margin finely toothed. Midrib flat above, secondary veins obtuse, widely parallel, tertiary veins reticulate. Stipules absent. |
| Inflorescences or flowers : | Flowers arranged in a many-flowered inflorescence, terminal, appearing with young leaves, unisexual, on different trees, pedicels less than 0.3 cm long. . |
| Fruits : | Fruit samara, up to 3.5 cm long, winged at one end. |
| Seeds : | Seed 1. |