绵毛棘豆 mian mao ji dou

Phaca lanata Pallas, Reise Russ. Reich. 3: 746. 1776.

Herbs, 5-8 cm tall, acaulescent, from a much-branched multiheaded caudex, tuft- or mat-forming, clothed with marces­cent stipules, sericeous. Stipules membranous, adnate to petiole. Leaves 5-7 cm; leaflets verticillate, in 12-18 whorls, 4-8 blades per whorl, arranged on opposite sides of rachis; leaflet blades oblong to linear, 3-12 × 1-2.5 mm, softly lanate-pubescent, apex obtuse. Racemes compact, a broad ovoid head, many flow­ered; peduncle shorter to slightly longer than leaves, densely spreading lanate. Calyx cylindric, 11-12 × 3-3.5 mm; lobes triangular-lanceolate, ca. 2 mm. Corolla reddish pink to purple; standard 2-2.5 cm, lamina ovate-orbicular and 1-1.2 cm wide, apex rounded to barely emarginate; wings 1.8-2 cm, lamina longer than claw; keel 1.5-1.6 cm, beak ca. 2 mm. Legume ovoid-oblong, 12-14 × ca. 6 mm, slightly inflated, thinly leath­ery, ± 2-locular, softly lanate. Fl. Jun-Jul, fr. unknown. 2n = 16.

Sandy areas; ca. 1200 m. Nei Mongol [Russia (Siberia)].