Perennial or annual, herb or climber, to 3 m high. Fl. white-cream-yellow-purple, Feb to May. Clay, sandstone, basalt. Floodplains, grasslands, drainage depressions, tidal flats.
Twining or climbing plants. Stems terete, not spiny, hairy; pustules or glands absent. Leaves or phylloclades clearly present, compound, alternate, not continuous with stem, 90-140 mm long, hairy, with simple hairs, flat with flat margins; margins entire; tubercles absent, pinnately arranged, terminal leaflet present, stalked; pustules or glands absent. Stipules present and persistent to older leaves, 8-10.5 mm long, without glands, ribless. Bracteoles present but early deciduous, 2-3 mm long, hairy, not striate. Calyx 3-4 mm long, not accrescent, hairy, with simple hairs, ribless; pustules or glands absent. Corolla 7-10 mm long, uniformly coloured, yellow; claws present. Stamens ten. Fruit dehiscent (a pod or follicle), 60 mm long, 7 mm wide, not constricted between the seeds, flat or compressed, glabrous, not beaked. Flowers in March, April and May.