丝路蓟(原变种) si lu ji (yuan bian zhong)

Serratula arvensis Linnaeus, Sp. Pl. 2: 820. 1753; Breea arvensis (Linnaeus) Lessing; Carduus arvensis (Linnaeus) Robson; Cephalonoplos arvensis (Linnaeus) Fourreau; Cirsium ochrolepideum Juzepczuk; Cnicus arvensis (Linnaeus) Roth.

Stems glabrous but sparsely cobwebby below capitula. Leaves ± concolorous, green, glabrous or abaxially very sparsely cobwebby. Lower cauline leaves ± shortly petiolate; leaf blade elliptic to elliptic-lanceolate, 7-17 × 1.5-4.5 cm, pinnately lobed or pinnatifid; segments 3-5 pairs, obliquely triangular to obliquely elliptic, with 2 or 3 teeth each with lateral spinules and a ca. 5 mm apical spine. Middle and upper cauline leaves similar but sessile, base semiamplexicaul. Involucre very sparsely cobwebby. Outer and middle phyllaries with a ca. 0.5 mm patent to reflexed apical spinule. Fl. and fr. Jun-Sep. 2n = 34, 34+0-1B, 51, 68.

Moist places by ditches, farmlands, lakesides; 700-4300 m. Gansu, Xinjiang, Xizang [Afghanistan, India, Kazakhstan, Nepal; SW Asia, Europe].