Rhynchosia arida C.H.Stirt.

Deciduous shrub up to 1 m high and broad, flowering in spring; branchlets virgate, puberulous and sparsely glandular. Leaves trifoliolate; leaflets ovate or elliptic, apex uncinate, base truncate, 10-20 mm long, 9-13 mm wide, dark green; laterals unequal-sided, oblique at base, smaller than symmetrical terminal leaflet; puberulous above, glabrescent below, glandular on both surfaces. Stipules subulate, glandular hairy. Petioles 9-13 mm long. Racemes axillary, 2-4-flowered, longer than leaves, peduncle 13-20 mm long. Flowers yellow, 14-16 mm long; bracts 4-5 mm long, caducous, slightly boat-shaped. Calyx 15-16 mm long, unequally lobed, sparsely pilose, conspicuously covered with large bulbous-based glands; tube 5 mm long; keel lobe longest, lanceolate, acuminate, laterals falcate, vexillar lobes fused for half their length. Standard unguiculate, 11-12 mm long, 10 mm wide, broadly ovate, glabrous, eglandular, scarcely reflexed, shorter than keel but longer than wings, appendages weakly developed and situated well above small auricles. Wings 10-11 mm long, glabrous, shorter than keel, pocket present, auricle well developed, sculpturing weakly developed along ridge of pocket, lamellate. Keel blades 13 mm long, 7-8 mm wide at maximum, glabrous, incurved, apex obtuse, pocket present. Staminal sheath 12-13 mm long, free stamen 14 mm long, anthers uniform, medifixed and basifixed, dehiscence longitudinal. Gynoecium 13 mm long, ovary 4 mm long with gynophore 1 mm long; clothed with short patent pubescence; curvature 5 mm high; stigma capitate, exerted beyond stamens. Nectary 0.4-0.6 mm high, margin undulate. Fruits 34 cm long, 1 cm wide, falcate, woody, upper margin undulate, finely pubescent. Seed unknown.