*Small deciduous trees up to 20 m tall. *Leaves opposite, ovate to broadly ovate, cordate at base, entire or slightly 3-5-lobed, usually tomentose below. *Flowers in 3-5-flowered cymes; calyx campanulate, 5-lobed; corolla zygomorphic, shortly 5-lobed, slightly 2-lipped; stamens 4. *Fruit a dehiscent capsule. *Seed winged. The trees are easy to propagate by means of cuttings. Their growth is very rapid: mean annual diameter increment is 6.5 cm, and mean annual height increment is 1.72 m. The wood is comparatively soft, white or reddish-brown, and has a beautiful grain. Its air-dry density is about 320 kg/m<sup>3</sup>.
== Selected sources ==
15*Binua, 53T.M. & Acosta, 112R.T., 1161978. Field notes on kiri. Canopy International 4(6): 6.*Flore du Cambodge, 174du Laos et du Viêt-nam [Flora of Cambodia, Laos and Vietnam] (various editors), 1960-. Volume 1-. Muséum National d'Histoire Naturelle, Laboratoire de Phanérogamie, Paris, France.*Nair, P.K.R., 1993. An introduction to agroforestry. Kluwer Academic Publishers, Dordrecht, the Netherlands. 499 pp.*National Academy of Sciences, 1980, 1983. Firewood crops: Shrub and tree species for energy production. 2 volumes. National Academy Press, Washington, D.C., United States. 237, 92 pp.*Wealth of India (various editors), 1948-1976. A dictionary of Indian raw materials and industrial products: raw materials. 11 volumes. Publications and Information Directorate, Council of Scientific and Industrial Research, New Delhi, India. 4441 pp.