An erect, branched shrub, 1-2 m tall, with white-lanate branch ends. Leaves trifoliolate, those on long-shoots with axillary short-shoots developed at an early stage. Leaflets (of long-shoot leaves) very narrowly elliptic, lanceolate or oblanceolate, tapering at both ends, (10-)15-20 x 3-7 mm, acute, weak, soft, long-and white-sericeous. Inflorescence a terminal head of 10-25 flowers. Bract flat, linear, 9-11 mm(including the long hairs up to 15 mm) long, ±1.5 mm broad or less, weak, covered with very long, white hairs. Pedicel ±1 mm long or less, long-sericeous. Bracteoles linear or subfiliform, 8-9 mm long, 1 mm broad, long-sericeous. Calyx very long-sericeous all over; lobes linear, 3-5.5 mm long, tapering, weak. Petals light yellow with rather long claws. Standard blade elliptic, ±8-8.5 x 6.5-7 mm, obtuse, densely long-sericeous on the back. Wing blades oblong to very narrowly elliptic, 8.5-9 x 3-3.5 mm, long-sericeous on most parts; the base with some rows of indistinct small folds. Keel blades lunate. 5-6 x ±3 mm, with slightly concave upper margin, long-sericeous on the lower apical parts. Pistil long-sericeous on ovary and style base; ovules 2; style regular, capitate. Pod ovate, convex, ±6 x 3 mm, sericeous, one-seeded.
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Like A. salicifolia but pubescence longer and more silky, flowers larger, keel 5-6 mm long, and ovules only 2.