Liana with glabrescent branchlets. Bifoliolate leaves with a simple tendril, leaflets to 210mm x 100mm. Axillary racemes with bracts to 3mm long & bracteoles to 2mm long. Lemon-yellow flowers with 5-toothed calyx to 10mm x 7mm, yellow corolla to 70mm x 10mm, tube to 50mm long & lobes 18mm long.