疏毛棘豆 shu mao ji dou

Astragalus pilosus Linnaeus, Sp. Pl. 2: 756. 1753.

Herbs, 20-50 cm tall, caulescent, arising from a superficial multiheaded caudex. Stems thick, erect, with many branches, with 4-8 or more apparent internodes, with spreading dense long trichomes. Stipules oblong-ovate to lanceolate, (0.6-)1-1.3 cm, herbaceous, with long trichomes, adnate to base of petiole, apex acute. Leaves 5-12 cm, 15-29-foliolate; petiole and ra­chis sulcate, with spreading trichomes; leaflet blades elliptic to lanceolate, 1-2.3 × 0.3-1 cm, both surfaces pubescent, base rounded, apex acute. Racemes dense but slightly elongating in fruit, many flowered, basally with dense trichomes; peduncle in uppermost axils, 3-12 cm, thick, longer than leaves, with ap­pressed long trichomes; bracts linear-lanceolate, ca. 7 mm, herbaceous, with long trichomes, apex acute. Calyx broadly cylindric, 7-9 mm, with trichomes; lobes subulate to linear, 3.5-4.5 mm. Corolla pale yellow; standard 0.9-1.4 cm, lamina broadly ovate, apex emarginate; wings 8-11 mm; keel 7-10.2 mm, beak 0.5-1 mm. Legume lanceolate-ovoid to cylindric, 1.5-2 × 1-1.5 cm, ascending, leathery, 2-locular, with spreading dense white trichomes, septum developed, adaxial suture grooved, apex acute. Fl. Jun-Jul, fr. Jul-Aug. 2n = 16.

Valleys, SW-facing hilly areas, meadows, and shrublands; 1400-4300 m. Xinjiang [Kazakhstan, Mongolia, Russia; Europe].