Annual, Perennial, Herbs, Taproot present, Nodules present, Stems erect or ascending, Stems or branches arching, spreading or decumbent, Stems less than 1 m tall, Stems solid, Stems or young twigs sparsely to densely hairy, Leaves alternate, Leaves petiolate, Extrafloral nectary glands on petiole, Stipules conspicuous, Stipules green, triangulate to lanceolate or foliaceous, Stipules persistent, Stipules free, Leaves compound, Leaves even pinnate, Leaf or leaflet margins entire, Leaflets opposite, Leaflets 10-many, Leaves glabrous or nearly so, Flowers solitary in axils, or appearing solitary, Inflorescence axillary, Bracts very small, absent or caducous, Bracteoles present, Flowers actinomorphic or somewhat irregular, Calyx 5-lobed, Calyx hairy, Petals separate, Petals clawed, Petals orange or yellow, Stamens 9-10, Stamens heteromor phic, graded in size, Stamens completely free, separate, Filaments glabrous, Anthers opening by basal or terminal pores or slits, Style terete, Fruit a legume, Fruit unilocular, Fruit freely dehiscent, Fruit elongate, straight, Fruit oblong or ellipsoidal, Fruit exserted from calyx, Fruit internally septate between the seeds, Fruit compressed between seeds, Fruit explosively or elastically dehiscent, Valves twisting or coiling after dehiscence, Fruit glabrous or glabrate, Fruit hairy, Fruit 3-10 seeded, Seeds subquadrate, Seed surface smooth, Seeds olive, brown, or black.
"Shrubs or herbs, young stem, rachis often appressed hairy. Leaves spirally arranged or distichous, paripinnate, 4-8 cm long; leaflets opposite 24-50 pairs, 3-6 x 1-2 mm, linear-oblong, oblique at base, margins ciliate; rachis with a sessile gland near the base; stipules linear 5-8 mm long. Flowers solitary or many-flowered, racemes, axillary or supra axillary; peduncle 1-2 cm long; bracts ovate, 3-6 mm long; bracteoles scarious; pedicels 0.5-1.5 cm long. Sepals 5, lanceolate, 4-5 mm long. Petals 5, yellow, 5-8 mm long, obovate. Stamens 10, alternate short and long. Ovary linear, densely silky hairy, stigma truncate. Pods 3-6 x 0.4-0.5 cm. plano-compressed, thickened along sutures, elastically dehiscent; seeds c. 20, ellipsoid."