Frequently grows into a small tree, sometimes somewhat scandent but usually flowers and fruits as a shrub 3-4 m tall.
Sepals about 9-13 mm long. Outer pair of sepals fused to form a calyptra which splits irregularly. Inner pair of sepals free from one another. Petals about 15-20 mm long. Stamens about 50-85. Gynophore about 25-65 mm long, pubescent at the base.
Cotyledons lanceolate, about 22-30 x 11-15 mm, apex acute, base obtuse. At the tenth leaf stage: leaves ovate, stipules straight and spiny, about 4-7 mm long. Stem hairs translucent to white, small and hooked at the apex. Seed germination time 19 to 32 days.