大穗雀麦 da sui que mai

Forasaccus lanceolatus (Roth) Bubani; Serrafalcus la-nceolatus (Roth) Parlatore.

Annual. Culms erect or geniculately ascending, 60–80 (–100) cm tall. Leaf sheaths pubescent; leaf blades 15(–20) cm × 3–6 mm, both surfaces pubescent. Panicle narrow, 8–15 cm; branches erect, shorter than spikelets, scabrid, rather stout. Spikelets lanceolate cylindrical, 20–30 × 6–10 mm, florets 10–16, overlapping; rachilla internodes not visible; lower glume 6–8 mm, 3–5-veined, apex acuminate, upper glume 9–11 mm, 5–7-veined; lemmas elliptic, 12–15 × 2–2.5 mm in side view, herbaceous, smooth, glabrous or pubescent, margins membranous, 7–9-veined, apex 2-toothed, teeth acuminate, 1–2 mm, awned from sinus; awn 10–20 mm, base slightly flattened, twisted, recurved at maturity; palea slightly shorter than lemma, keels ciliate. Anthers 1.5–2.5 mm. Fl. and fr. Apr–Jul. 2n = 28.

Forest margins, slopes, thickets, grasslands; 300–1800 m. Xinjiang [Afghanistan, Pakistan, Turkmenistan; N Africa, SW Asia, S Europe].