22. Indigofera hebepetala Bentham ex Baker var. glabra Ali, Bot. Not. 3: 572. 1958.
光叶毛瓣木蓝 guang ye mao ban mu lan
Indigofera hebepetala f. glabra (Ali) H. Ohashi.
Shrubs, 1-3 m tall. Stems dark brown, terete; young branches with sparse appressed medifixed symmetrically 2-branched trichomes, glabrescent. Stipules narrowly lanceolate, ca. 3 mm, caducous. Leaves 10-15(-25) cm, 5-13(or 15)-foliolate; petiole and rachis with appressed brown medifixed trichomes; petioles 2-5 cm; rachis adaxially grooved; stipels subulate, ca. 2 mm; petiolules 2-3 mm, densely hairy; leaflet blades opposite, ovate, ovate-elliptic, or oblong, 1.2-6.5(-8) × 0.7-3.5(-4.5) cm, papery, abaxially with white and brown appressed medifixed trichomes, midvein adaxially flat, secondary veins 6-8 on each side of midvein, base rounded to broadly cuneate, apex obtuse to emarginate. Racemes 10-25 cm; peduncle 2-2.5 cm; bracts boat-shaped, ca. 6 × 1-3 mm, covering buds, outside hairy. Pedicel 1-2 mm. Calyx campanulate, ca. 2 mm, with appressed brown trichomes; tube ca. 1.5 mm; teeth triangular, ca. 0.5 mm. Corolla purple; standard 1.2-1.4 × 0.6-0.8 cm, outside hairy; wings 1-1.1 cm, glabrous; keel as long as wings. Stamens 8-10 mm; anthers ovoid, base with a few trichomes. Ovary glabrous. Legume cylindric, 2.5-5.5 cm, glabrous; endocarp not blotched. Seeds 8-10 per legume, ca. 2 × 1.5 mm. Fl. Jun-Jul, fr. Jul-Oct. 2n = 16.
Evergreen forests, slopes in scrub; 1700-2900 m. S Xizang [Bhutan, India, Nepal, Pakistan].
Indigofera hebepetala var. hebepetala occurs in India, Pakistan, and Nepal and differs in having leaflet blades pubescent on both surfaces.