Shrubs, 1-3 m tall. Stems grayish brown; young branches angular, with dense long spreading brown basifixed or subbasifixed extremely asymmetrically 2-branched trichomes and short appressed submedifixed symmetrically 2-branched trichomes. Stipules linear, 5-6 mm, with ascending basifixed trichomes. Leaves 10-20 cm, (19-)31-41-foliolate; petiole and rachis with densely ascending basifixed trichomes; petiole very short, adaxially grooved; leaflet blades opposite, subopposite, or alternate, lanceolate-oblong but terminal one obovate-oblong, 1.2-2 × 0.4-0.9 cm, both surfaces with densely ascending brown to grayish brown basifixed trichomes, midvein adaxially slightly impressed, secondary veins not visible, base cuneate to rounded, apex obtuse to acute. Racemes ca. 12 cm, many flowered; peduncle and rachis with dense spreading basifixed trichomes; peduncle longer than petioles; bracts linear, ca. 7 mm, hairy. Pedicel ca. 1.5 mm, hairy. Calyx ca. 3.5 mm, with long spreading brown basifixed trichomes; tube ca. 1.5 mm; teeth lanceolate, most abaxial one ca. 2 mm. Corolla yellowish; standard elliptic, 10-11 × ca. 5 mm, outside with appressed long trichomes; wings ca. 9.5 mm, glabrous; keel ca. 1 cm, outside ciliate and hairy on top. Stamens 9-10.5 mm; anthers ovoid, glabrous. Ovary hairy. Legume subcylindric, deflexed, 3-4 cm, with densely ascending basifixed trichomes; endocarp blotched with purple. Seeds more than 10 per legume, reddish brown, cubic, ca. 2 × 2 mm. Fl. Apr-Jul, fr. Aug-Nov.
Can be grown by cuttings or seedlings. Seeds needs soaking.
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