Small glabrous trees. Leaves opposite, 3-4-pinnate, leaflets entire. Flowers in terminal racemes, purplish to white. Calyx campanulate, 5-lobed, persistent; lobes inconspicuous. Corolla campanulate, unequally 5-lobed. Stamens 5. Disk present. Ovary bilocular, with many ovules. Capsule elongated, compressed and large, dehiscing septifragally. Seeds large, many, discoid, with a broad membranous wing.