Plants 30-90 cm tall, very sparsely to sometimes loosely covered with subappressed hairs 0.3-0.5 mm. Stems several, 1.5-2 mm thick, ascending, simple or with short non-flowering lateral branches, glabrous or to loosely hairy. Leaves 7-17 cm; stipules 8-15 mm, glabrous or ciliate; petiole short, like rachis very sparsely white and black hairy; leaflets in 12-16 pairs, narrowly elliptic, 5-18 × 3-8 mm, abaxially hairy at margins and at midvein or all over, adaxially glabrous, apex rounded to truncate. Racemes shortly cylindric, 3-6 cm, densely many flowered, in fruit elongated up to 15 cm; peduncle 6-11 cm, sparsely white and black hairy or subglabrous; bracts 5-8 mm, glabrous. Bracteoles sometimes present, 0.4-1 mm, like bracts soon falling. Calyx ca. 6 mm, at base densely, otherwise sparsely, or all over rather densely, white or black hairy; teeth mostly unequal, 1.5-3 mm. Petals yellow; standard widely obovate, 10-11 × ca. 7 mm, emarginate; wings and keel 9-10 mm. Stigma glabrous. Legumes with a stipe 6-7 mm, obliquely ellipsoid, 11-17 mm, 7-8 mm high and 3-4 mm wide, keeled ventrally, slightly grooved dorsally, with a curved beak 2-4 mm, 2-locular; valves thin, brown to blackish, glabrous.
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