陇东棘豆 long dong ji dou

Herbs, 35-50 cm tall or more, caulescent, from a simple or branched caudex. Stems thin, decumbent or sprawling, with 4 or more apparent internodes, with many branches, subglabrous or with spreading sparse white trichomes. Stipules subulate to triangular, with a 2-5 mm distinct part, with subspreading sparse white trichomes, apex acuminate. Leaves 2-4 cm, 7-17-foliolate; petiole ca. 2 mm; petiole and rachis with spreading sparse to dense white trichomes; leaflet blades linear-oblong to linear, 5-14 × 1-2 mm, both surfaces with subspreading white trichomes, base cuneate to subrounded, margin slightly in­curved, apex acute. Racemes spiciform, 1.5-3.5 cm, many flowered; peduncle 1.5-3 cm, densely appressed pubescent; bracts subulate, 2-3 mm, densely appressed pubescent. Flowers 6-9 mm. Pedicel ca. 1 mm. Calyx often purplish, tubular-cam­panulate, ca. 5 mm, sparsely appressed pubescent; lobes subu­late, 1-2 mm. Corolla blue; standard 6-9 mm, apex rounded; wings ca. 5.5 mm, lamina obliquely oblong, apex obtuse; keel ca. 5.5 × 1.5 mm, beak ca. 0.5 mm. Legume sessile or with a stipe to 1 mm; body ellipsoid, 10-12 × 3-4 mm, slightly in­flated, subleathery, with subspreading white trichomes, septum ca. 0.5 mm wide, apex acute, beak 2.5-3 mm and recurved. Fl. Aug-Sep, fr. Sep-Oct.

● Valleys, grasslands on hillsides; 1100-1200 m. Gansu, Ningxia.