Indigofera tristis E.Mey.

Erect, slender subshrub, 0.5-2.0(2.5) m high; stems single or few, woody below, branched in upper third, angular, appressed hyaline strigillose. Stipules 0.5-2.0 mm long, subulate. Leaves pinnately 7-13-foliolate, rachis 4-20(30) mm long; petioles 0.5-3.0(4.0) mm long. Terminal leaflet 5-16(22) x 1.5-4.0(5.0) mm, oblanceolate to narrowly oblong-elliptic, apex ± rounded; paler green and sparsely strigose above, sparsely to densely strigose beneath. Inflorescences of (20)30-240 mm long, ± densely (10)15-70(150)-flowered racemes, usually many in number (> 3) per branch, particularly in upper half, buds often blackish; peduncle 8-80 mm long; pedicels (2)3-7 mm long. Flowers 10-14 mm long, crimson-red; calyx 1.5-2.5 mm long, densely appressed grey to dark brown strigose, also with ferruginous hairs, lobes broadly triangular, shorter than to ± equalling tube; standard dorsal surface densely dark brown to blackish strigose often scattered with ferruginous and sometimes hyaline hairs; keel apex obtuse. Stamens 9-13 mm long. Flowering time Nov.-May. Pod 24-50 x 1.5-2.6 mm.