41. Indigofera dumetorum Craib, Notes Roy. Bot. Gard. Edinburgh. 9: 109. 1916.
黄花木蓝 huang hua mu lan
Shrubs, to 2.5 m tall. Stems rufous brown or gray, terete, with obvious lenticels; young branches striate, with spreading brown medifixed subsymmetrically crooked 2-branched trichomes. Stipules narrowly lanceolate, 5-8 mm, caducous. Leaves ca. 13 cm, 5-9-foliolate; petiole and rachis terete, adaxially slightly flattened, with dense spreading white crooked medifixed trichomes; petiole ca. 2 cm; stipels not visible; petiolules ca. 2 mm; leaflet blades opposite or subopposite, oblong, elliptic, or ovate, 2-5 × 1.5-2.5 cm, thickly papery, abaxially with dense spreading white medifixed crooked trichomes, adaxially with appressed white medifixed trichomes, midvein abaxially prominent and adaxially slightly impressed, secondary veins 8-10 on each side of midvein, base broadly cuneate to rounded, apex obtuse to acute. Racemes ca. 15 cm; peduncle and rachis with dense spreading white medifixed trichomes and crooked trichomes; peduncle 2-3 cm; rachis striate; bracts caducous. Pedicel 2-4 mm, hairy. Calyx campanulate, 4.5-5 mm, with dense spreading brown submedifixed crooked trichomes; tube ca. 2.5 mm; teeth triangular, unequal, most abaxial one as long as tube. Corolla yellowish; standard ovate-oblong, 1.2-1.7 × 0.6-0.7 cm, outside with appressed white trichomes, base not clawed, apex emarginate; wings 10-12 × ca. 2.5 mm, outside glabrous, margin ciliate; keel as long as standard, outside with appressed brown trichomes on top part, clawed at base, spur ca. 0.5 mm. Stamens 1.3-1.6 cm; anthers ovoid-ellipsoid, glabrous. Ovary with 12-15 ovules. Legume slightly compressed, ca. 7 cm, with spreading brown or gray submedifixed trichomes, apex hooked. Fl. Jun, fr. Aug-Sep.
● Dry woodlands; 2100-2700 m. SW Sichuan, NW Yunnan.