Liana to 6m or treelet with puberulous lenticellate branches becoming glabrescent. 2-3 foliolate leaves with simple terminal tendril, glabrous leaflets to 240mm x 90mm. Axillary racemes with bracts & minute bracteoles, deep yellow flowers with 5-dentate calyx to 8mm x 8mm, yellow corolla to 80mm x 20mm, tube 55mm long & lobes 20mm long.