Leucaena

Unarmed trees or shrubs. Leaves bipinnate, a conspicuous gland often present at junction of lowest pair of pinnae, petiole and rachis otherwise eglandular or rarely with glands between other pairs of pinnae; pinnae each with one to many pairs of leaflets. Inflorescence capitate, pedunculate, axillary, 1-3 together, often racemosely aggregated. Flowers bisexual, sessile. Calyx gamosepalous, 5-toothed. Petals 5, free, pubescent or glabrous outside. Stamens 10, free, fertile; anthers mostly eglandular apically. Ovary pubescent or sometimes glabrous. Pod oblong or linear-oblong, usually thinly subcoriaceous, compressed, dehiscing into 2 nonrecurving valves. Seeds lying +/- transversely in pod, compressed, brown, smooth, unwinged. x= 13, 14 ( polyploidy, B-chromosomes).