Slender twining vine; stems pubescent to glabrate. Leaves trifoliolate; stipules ovate, ca 2 mm long; petioles 2-4 cm long; petiolules minutely pulvinate; leaflets lanceolate to oblong-elliptic, narrowly rounded at apex, rounded at base, glabrous above, sparsely strigose below, the terminal leaflet 2-6 cm long, 1.5-2 cm wide, the lateral leaflets smaller. Flowers solitary to few, axillary or racemose; calyx 3.5-4 mm long, 4-lobed by fusion of the 2 upper lobes; corolla ca 5 mm long; standard ± spatulate, emarginate and recurved near apex at anthesis, white or tinged with violet; wings pale violet, held erect, attached to keel near apex, the keel white, much shorter than wings, fused only near apex; stamens monadelphous, alternate; anthers small. Legumes 2-3 (7) cm long, ca 2 mm wide, somewhat flattened, with an obliquely descending beak, appressed-pubescent; seeds oblong, ca 2 mm long, olive-green. Croat 13222.
Apparently rare; collected once in the Laboratory Clearing. Apparently flowers and fruits mostly in the dry season.
Costa Rica to northern South America; Trinidad and Jamaica. In Panama, known only from tropical moist forest on BCI and in Darien.