L.f., Suppl. 317. 1781 Liana or climbing shrub, to 13 m tall, forming dense masses along shore; stems minutely fissured and bearing prominent round lenticels. Leaves compound; stipules caducous; petioles 1-2 cm long; rachis puberulent when young, 2-6 cm long, often zigzag with the leaflets alternate; leaflets (1) 2-5, ovate to elliptic, abruptly long-acuminate (the acumen to 1.8 cm long), rounded or obtuse at base, 5.5-12 cm long, 3-6 cm wide, glabrous and shiny above except for pubescent midrib, glabrous and pale below, the reticulate veins prominulous but not raised. Racemes axillary; rachises to ca 2 cm long, +/- strigose; pedicels slender, 2-3 mm long; calyx inflated, campanulate, to 2 mm long and wide, +/- irregularly lobed ca one-third its length, the teeth acute and subequal; petals 5-7 mm long, white, clawed ca half their length, the wings truncate to subcordate and oblique at base; stamens diadelphous, 4-5 mm long, the column split into 2 fascicles; ovary stipitate, the stipe slender, about as long as ovary; style bent sharply forward. Legumes +/- orbicular, flattened, becoming bowl-shaped in age, 3.5-4.5 cm long, 2-3 mm thick, glabrous, borne on stipes 5-7 mm long, one margin sometimes raised, the surface often with raised reticulations; seeds brown, discoid, ca 1.5 cm diam, the margin thin. Croat 13960, Foster 1349.