篦齿雀麦 bi chi que mai

Bromus japonicus Thunberg var. pectinatus (Thunberg) Ascherson & Graebner; B. patulus Mertens & W. D. J. Koch var. pectinatus (Thunberg) Stapf; B. gedrosianus Pénzes; B. rechingeri Melderis.

Annual. Culms loosely tufted, geniculately ascending, 50–80 cm. Leaf sheaths pubescent; leaf blades 15–30 cm × 4–8 mm. Panicle lax, spreading, 15–25 cm; branches and pedicels longer than spikelets, ascending or nodding, filiform, flexuous. Spikelets lanceolate, 20–30 mm, florets 6–10; glumes unequal, lower glume 5–8 mm, narrowly lanceolate, 3-veined, apex acuminate, upper glume 8–10 mm, 5-veined, apex acute; lemmas narrowly oblanceolate, (8–)10–15 mm, herbaceous, margins membranous, inrolled at maturity, apex 2-toothed, teeth acuminate, 2–3 mm, awned from sinus; awn 8–17 mm, usually straight, erect or weakly recurved; palea keels pectinate-ciliate, hairs ca. 0.5 mm. Anthers 0.5–1.4 mm. Fl. and fr. May–Sep.

Slopes, grassy places, ditch banks; 700–1400 m. Gansu, Hebei, Henan, Nei Mongol, Qinghai, Shaanxi, Shanxi, Sichuan, Xinjiang Xizang, Yunnan [Afghanistan, Bhutan, India, Kashmir, Nepal, Pakistan, Tajikistan; Africa, SW Asia, Europe].