Melicope quadrangularis. a member of the Rutaceae (rue) family, is a shrub or small tree. Young branches are covered with fine yellow hairs but become hairless with age. The thin, leathery, elliptical leaves, 9.5 to 16 cm (3.5 to 6 in) long and 4.5 to 7.5 cm (2 to 3 in) wide, are oppositely arranged. The upper leaf surface is hairless and the lower surface is sparsely hairy, especially along the veins. Flowers are solitary or in clusters of two. The fruits are somewhat cube-shaped, flattened capsules, about 13 mm (0.5 in) long and about 19 to 22 mm (0.8 in) wide with a conspicuous central depression at the top of the fruit. The capsules are four-lobed and completely fused. The exocarp is sparsely hairy and the endocarp is hairless.