Description from Flora of China
Indigofera craibeana H. Léveillé.
Subshrubs, sometimes prostrate, 10-30 cm tall, branching from base. Young branches slender, angular, with appressed brown medifixed symmetrically 2-branched trichomes. Stipules linear, 3-4 mm. Leaves 2-6 cm, 5-13-foliolate; petiole and rachis hairy; petiole 4-11 mm; rachis terete, adaxially grooved; stipels ca. 1 mm; petiolules ca. 1 mm; leaflet blades opposite, oblong to elliptic, 5-17 × 3-7 mm, papery, both surfaces with white and brown appressed medifixed trichomes, midvein adaxially prominent, secondary veins 5 or 6 on each side of midvein and obvious, base rounded to subcordate, apex obtuse to emarginate and mucronate. Racemes 2-4 cm; peduncle 4-5 mm, hairy; bracts linear, ca. 2 mm. Pedicel 2-3 mm. Calyx ca. 3 mm, outside hairy; teeth lanceolate-subulate, as long as tube. Corolla purple; standard broadly ovate, 6-7 mm, outside hairy, apex rounded; wings 7-9 mm, margin ciliate; keel as long as wings, outside hairy, apically tapering and acute. Stamens 4-5 mm, much shorter than petals; anthers ovoid, base with a few trichomes. Ovary glabrous. Legume cylindric, 1-2 cm, with appressed medifixed trichomes; endocarp blotched. Seeds rufous brown, ellipsoid, 1.5-2 mm. Fl. May-Jul, fr. Sep-Dec.
Forests, scrub, grassland slopes; 1200-3000 m. W Guizhou, SW Sichuan, S Xizang, Yunnan [Thailand].