山地雀麦 shan di que mai

Ceratochloa marginata (Nees ex Steudel) W. A. Weber; Forasaccus marginatus (Nees ex Steudel) Lunell.

Perennial. Culms tufted, ca. 50 cm tall, ca. 5 mm in diam. Leaf sheaths retrorsely pubescent; leaf blades 10–20 cm × 4–10 mm, pubescent. Panicle erect, rather narrow, 10–15 cm; primary branches 3–5 cm, lower branches erect or spreading, each bearing 1 or 2 spikelets. Spikelets 20–30 × 5–8 mm, florets 9–13, overlapping; rachilla internodes not visible; lower glume 6–7 mm, upper glume ca. 8 mm, apex acuminate; lemmas 10–20 × ca. 2.2 mm in side view, keeled, pubescent, margins membranous, awned from apex; awn 5–7 mm. Fl. May–Jun. 2n = 28, 42, 56, 70.

Roadsides, forest margins, moist places, adventive. Hebei [native to North America].