Mostly glabrous liana. Bipinnate or tripinnate leaves with a simple tendril, each pinnae 5-9 foliate with leaflets to 100mm x 35mm. Axillary panicles with bracts to 1.5mm long & bracteoles to 4mm x 3mm, yellow flowers, calyx to 9mm x 6mm, yellow corolla to 50mm x 12mm. Fruit a glabrous capsule to 390mm x 18mm.