大头续断 da tou xu duan

Dipsacus lijiangensis Ai & H. B. Chen ["lijigensis"].

Herbs, perennial, up to 2 m tall. Taproots robust, up to 2 cm in diam. Stems branched, 8-ridged, ridges sparsely spiny. Cauline leaves opposite, lowermost leaves with petiole up to 5 cm, uppermost leaves subsessile; leaf blade broadly lanceolate, up to 25 × 7 cm, lyrate; terminal segment much larger than lateral ones; lateral segments 3-8-paired, both surfaces setose. Heads solitary or 3, globose or oblong, 3.5-4.9 cm in diam.; peduncles up to 25 cm; involucral bracts linear, setose; bracts lanceolate or obovate-lanceolate, 14-15 mm, rostrum 5-11 mm, spiny and pilose; involucels ovoid-columnar, 5-8 mm. Corolla 9-14 mm; tube 3.5-5 mm; lobes unequal. Stamens exserted. Style exserted. Achenes cuneate, 4-angular, ca. 6 × 1.5 mm, densely pubescent, apex exposed. Fl. Jul-Aug, fr. Sep-Oct.

● Forests, grassy slopes, by streams; 2100-3900 m. W Sichuan, SE Xizang, NW Yunnan (Dêqên, Lijiang, Zhongdian).