花苜蓿 hua mu xu

Trigonella ruthenica Linnaeus, Sp. Pl. 2: 776. 1753; Medi­cago liaosiensis (P. Y. Fu & Y. A. Chen) X. Y. Zhu & Y. F. Du; M. ruthenica var. inschanica (H. C. Fu & Y. Q. Jiang) X. Y. Zhu; Melilotoides ruthenica (Linnaeus) Soják; M. ruthenica var. inschanica (H. C. Fu & Y. Q. Jiang) H. C. Fu & Y. Q. Jiang; M. ruthenica var. liaosiensis (P. Y. Fu & Y. A. Chen) H. C. Fu & Y. Q. Jiang; Melissitus liaosiensis (P. Y. Fu & Y. A. Chen) Yakovlev; M. ruthenicus (Linnaeus) Peschkova; M. ru­thenicus var. inschanicus (H. C. Fu & Y. Q. Jiang) H. C. Fu & Y. Q. Jiang; M. ruthenicus var. liaosiensis (P. Y. Fu & Y. A. Chen) H. C. Fu & Y. Q. Jiang; Pocockia liaosiensis P. Y. Fu & Y. A. Chen; P. ruthenica (Linnaeus) Boissier; P. ruthenica var. inschanica H. C. Fu & Y. Q. Jiang.

Perennial herbs, 20-70(-100) cm. Stems erect or as­cending, branched at base, quadrangular. Stipules lanceolate, cuspidate, veins obvious, base rounded, auriculate, with 1-3 shallow denticles, apex slightly curved; petiole 2-7(-12) mm; leaflets varied in shape with different habitats, oblong, oblan­ceolate, cuneate, linear, and oblong-ovate, (6-)10-15(-25) × (1.5-)3-7(-12) mm, terminal largest, lateral veins 8-18 pairs, prominent on both surfaces, base cuneate, broadly cuneate, to rounded, margin entire below, slightly to irregularly serrulate in upper 3/4, apex truncate, obtuse, or retuse. Flowers (4-)6-9(-15) in umbels, sometimes to 2 cm; peduncles straight, usu­ally longer than subtending leaf; bracts 1-2 mm; pedicels 1.5-4 mm. Corolla yellow-brown, with scarlet to purple stripes in center, (5-)6-9 mm; standard oblong-obovate, obcordate, or spatulate; wings oblong; keel shortest, ovate. Ovary linear; ovules 4-8. Legume oblong or oblong-ovate, 8-15(-20) × 3.5-5(-7) mm, flat, veins inclined transversely, black when ripe, base tapering and slightly curved, stipitate, apex obtuse, apicu­late. Seeds 2-6, brown, elliptic-ovoid, ca. 2 × 1.5 mm, smooth. Fl. Jun-Sep, fr. Aug-Oct.

Sandy soil of stream banks, slopes, grasslands. Gansu, Hebei, Hei­longjiang, Henan, Jilin, Liaoning, Nei Mongol, Ningxia, Qinghai, Shaanxi, Shanxi, Sichuan [Mongolia, Russia (Far East, Siberia)].