Scandent shrub or liana. Leaves: petiole and main rachis up to c. 20 cm long, puberulous; pinnae c. 10 pairs, petiole and rachis, 4-6 cm long, puberulous. Inflorescences 25 cm long, rachis and branchlets pubescent, densely flowered; pedicels 2-3 mm, sparsely puberulous. Flowers seen rather young. Petals all similar, oblong, c. 2.3 by 0.3 mm, glabrous. Stamens: filaments 0.6-1.5 mm; anthers c. 1 mm long. Ovary sessile, c. 1 mm long, glabrous, 2-ovuled; style c. 1.5 mm, glabrous. Seeds c. 9 by 8 mm.
Asia-Tropical: Borneo (Kalimantan present, Sarawak present)
Malesia: Borneo (Sarawak, Kalimantan).
The present species is closely allied to Pterolobium densiflorum; with the limited collections of these two species examined, it is not easy to distinguish them especially with fruiting material. The flowers of the present species are rather similar to those of Caesalpinia.