贫育雀麦 pin yu que mai

Anisantha sterilis (Linnaeus) Nevski; Festuca sterilis (Linnaeus) Jessen; Genea sterilis (Linnaeus) Dumortier; Sche-donorus sterilis (Linnaeus) Fries; Zerna sterilis (Linnaeus) Panzer.

Annual. Culms simple or loosely tufted, erect or geniculately ascending, 50–100 cm tall, ca. 5 mm in diam., glabrous. Leaf sheaths pubescent; leaf blades soft, 5–20 cm × 4–10 mm, pubescent; ligule 2–4 mm. Panicle lax, open, 10–20 × 7–12 cm, nodding; branches spreading, up to 10 cm, each bearing 1–3 nodding spikelets. Spikelets oblong, wedge-shaped when mature, 20–35 × 4–8 mm, florets 5–9; lower glume subulate, 8–14 mm, 1-veined, upper glume oblong-lanceolate, 10–20 mm, 3-veined; lemmas lanceolate, 15–20 × 2–4 mm in side view, 7-veined, margins white membranous, apex 2-toothed, teeth 1–2 mm, awned from sinus; awn 15–30 mm, as long as or longer than lemma body, slender, straight; palea subequal to lemma, keels sparsely ciliate. Stamens 3, anthers ca. 1 mm. Fl. May–Jun. 2n = 14.

Wastelands; 600–3200 m. Jiangsu, Sichuan [Kazakhstan, Kyrgyzstan, Russia, Tajikistan, Turkmenistan, Uzbekistan; N Africa, SW Asia, Europe; introduced in America and Australia].

This species is a widespread weed, adventive in most temperate regions of the world.