Bolusia Benth.

Perennial herbs. Leaves 1-foliolate or digitately 3-foliolate; stipules leafy, sometimes toothed. Flowers few in leaf-opposed racemes, occasionally resupinate. Calyx-lobes subequal in length. Corolla greenish-yellow to pale pink, sometimes purplish marked; standard shortly clawed, with a very broad blade forming a hood around the keel and bearing 2 small fused ridge-like appendages at the base inside, glabrous or hairy outside; wings auricled; keel produced into a very long narrow beak, which coils spirally through 2·5–3·5 turns. Vexillary filament free or more commonly joined with the other 9 towards the base of the sheath; anthers dimorphic, 5 long alternating with 5 (perhaps sometimes only 4) much smaller ones. Ovary usually stipitate, with numerous ovules; style glabrous except for a ring of hairs around the terminal stigma. Pod inflated, dehiscent. Seeds oblique-cordiform to nearly horseshoe-shaped, with a deep hilar sinus.