Indigofera kirilowii var. alba Q. Z. Han; I. macrostachya Bunge (1858), not Ventenat (1804).

Shrubs, 30-10 cm tall. Stems terete; young branches angu­lar, with sparse appressed medifixed 2-branched trichomes, gla­brescent. Stipules lanceolate, 4-6 mm, caducous. Leaves 6-15 cm, (5 or)7-11-foliolate; petiole and rachis flat, adaxially slightly grooved, glabrous or with appressed medifixed tri­chomes; petiole 0.1-2.5(-3) cm; stipels subulate, 2-3 mm, per­sistent; petiolules ca. 2.5 mm, densely hairy; leaflet blades opposite, broadly ovate, ovate-rhombic, or elliptic, 1.5-4(-5) × 1-2.3(-3) cm, papery, both surfaces with appressed medifixed trichomes, abaxially pale green, adaxially darker, midvein abax­ially obviously prominent and adaxially slightly prominent, secondary veins obvious, base cuneate to broadly cuneate, apex rounded to acute. Racemes 5-12(-20) cm; rachis striate, with sparse appressed white medifixed trichomes; bracts linear-lan­ceolate, 2-5 mm. Pedicel 3-5 mm, glabrous. Calyx campanu­late, 2.5-4 mm, glabrous; tube ca. 1.5 mm; teeth triangular, shorter than to ± equaling tube, most abaxial one ca. 2 mm, margin ciliate. Corolla pink or rarely white; standard elliptic, 1.2-1.4(-1.8) × ca. 0.8 cm, outside glabrous, margin ciliate, apex obtuse; wing margin ciliate. Stamens 1.2-1.4 cm; anthers broadly ovoid, both ends hairy. Ovary glabrous. Legume brown, cylindric, 3.5-7 cm × ca. 5 mm, glabrous; endocarp blotched. Seeds more than 10 per legume, reddish brown, oblong, ca. 5 × 2.5 mm. Fl. May-Jul, fr. Aug-Oct. 2n = 16.

Scrub on slopes, woodlands; 100-400 m. Hebei, Henan, Jiangsu, SE Jilin, Liaoning, Nei Mongol, Shaanxi, Shandong, Shanxi [Japan, Korea].