A large shrub or small tree. It grows 5-12 m high. It can spread 4-7 m wide. In rainforest it can grow 30 m high. The bark is dark grey and furrowed. The leaves are alternate and pinnate. The leaves have 4-8 dark green leaflets. These are 4-6 cm long by 1-1.5 cm wide. They are paler underneath. They flowers are dull yellow. They hang down on long strings. The pods are long and slightly flattened. The pods are 45 cm long. The pods are divided into segments. The pods turn dark brown to black. The seeds are flat and yellowish-brown.
Tree to 30 m tall, often semi-deciduous; undersides of the leaflets sometimes remaining sparsely pubescent, otherwise glabrescent. Leaves c. 10 cm long; leaflets in 2-4 (-6) pairs, oblong to narrowly ovate, c. 4.5 cm long, c. 1.5 cm wide, rounded or slightly emarginate at the apex, brown or bright green above, sometimes reddish glaucous below. Pod slightly to strongly compressed, distinctly transversely ribbed between the seeds, 20-45 cm long, 1-2.5 cm wide.