46. Bromus hordeaceus Linnaeus, Sp. Pl. 1: 77. 1753.
毛雀麦 mao que mai
Avena mollis (Linnaeus) R. A. Salisbury; Bromus mollis Linnaeus; B. secalinus Linnaeus var. hordeaceus (Linnaeus) Linnaeus; Serrafalcus hordeaceus (Linnaeus) Grenier & Godron; S. mollis (Linnaeus) Parlatore.
Annual. Culms erect from a creeping or obliquely ascending base, 30–80 cm tall, minutely hairy immediately below inflorescence, nodes thinly hairy. Leaf sheaths pubescent; leaf blades linear, flat, 3–5 mm wide, soft, both surfaces pubescent; ligule ca. 1 mm. Panicle erect, usually dense, 5–10 cm; branches short; pedicels mostly shorter than spikelets, pubescent, spikelets many. Spikelets oblong, 12–20 × 4–6 mm, usually hairy, florets 6–12(–16), distal florets mostly sterile; rachilla internodes ca. 1 mm, with small bristles; glumes unequal, margins membranous, pubescent, obtuse, lower glume 4–5 mm, 3–5-veined, upper glume 5–8 mm, 5–7-veined; lemmas elliptic, 8–11 × ca. 2 mm in side view, papery, glabrous, prominently 7–9-veined, pubescent, margins membranous, apex obtuse, minutely 2-toothed, awned from 1–2 mm below apex; awn 5–10 mm, stout, straight; palea shorter than lemma, keels ciliate. Anthers 0.2–1 mm. Caryopsis shorter than or as long as palea. Fl. and fr. May–Jul. 2n = 28.
Gansu, Hebei, Qinghai, Taiwan, Xinjiang [Pakistan, Russia; SW Asia, Europe; adventive in America and Australia].
This species is widely introduced in temperate parts of the world.