山羊草 shan yang cao

Patropyrum tauschii (Cosson) A. Löve; Triticum tauschii (Cosson) Schmalhausen.

Culms 20–40 cm tall. Leaf sheath glabrous but margin ciliate; ligule 0.5–1 mm, membranous; leaf blade 4–6 × ca. 0.3 cm, scabrous, adaxial surface pilose. Spike cylindric, with (5–) 7–10(–13) spikelets. Spikelets cylindric, ca. 9 mm, with 3 or 4(or 5) florets. Glumes 4–6 mm, leathery, 7–9(–10)-veined, apex truncate or slightly toothed. Lemma lanceolate, 5-veined; first lemma ca. 7 mm; awn 1–4 cm. Palea equaling lemma. Fl. and fr. May–Jun. 2n = 14.

Stony slopes, fields of Triticum, weedy places. Henan, Shaanxi, Xinjiang [Afghanistan, Kashmir, Kazakhstan, Kyrgyzstan, Pakistan, Russia, Turkmenistan, Uzbekistan; SW Asia].

The name Aegilops squarrosa Linnaeus has been misapplied to this species by some authors.