Shrubs, 1.5-3 m tall. Stems terete, ridged, white woolly to appressed pubescent, glabrescent. Stipules lanceolate to ovate, 7-14 mm; petiole 1-3 cm, with a wide groove adaxially; leaflets elliptic, oblong-elliptic, or linear-ovate, 4-14 × 1.5-4 cm, flat on both surfaces, papery, dark green, yellow silky and white appressed pubescent abaxially, gradually glabrescent, becoming glaucous, glabrous or sparsely hairy along midrib adaxially, lateral veins 6-8 pairs, base cuneate, margins sometimes ciliate, apex acute or acuminate. Racemes terminal, 5-8 cm, with flowers in 2-7 whorls, axis densely white woolly, elongating at anthesis; bracts broadly ovate to obovate, 7-12 mm, acute; pedicels 1.5-2.5 cm. Calyx campanulate, 1-1.6 cm, white woolly. Corolla bright yellow, 1.8-2.6 cm; standard orbicular to broadly cordate, with 4-6 mm claw; wings shorter; keel equal to or slightly longer than standard, to 2.2 cm. Ovary stipitate, densely sericeous to almost glabrous, 4-10-ovuled. Legume broadly linear, flat, 7-15 × 0.9-1.5 cm, stipitate, apex sharply pointed; valves membranous, reticulate, glabrous to very sparsely pubescent. Seed brown, reniform, 4-5 × 3-3.5 mm, compressed. Fl. Apr-Jul, fr. Jun-Sep.
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