Twining herb with pilose stems. Trifolate glabrous leaves, terminal leaflet to 50mm x 40mm. Many-flowered racemes to 100mm long with bracts to 1.5mm long, pilose calyx to 7mm long with lobes 1mm wide, standard 7mm long, wings to 6mm x 1.7mm, keel to 7mm x 2.5mm.