长芒看麦娘 chang mang kan mai niang

Alopecurus mandshuricus Litvinov.

Annual, loosely tufted. Culms geniculately ascending, 15–30 cm tall. Leaf sheaths lax, smooth, glabrous, upper sheaths sometimes inflated; leaf blades soft, 3–9 cm, 1–3.5 mm wide, abaxial surface smooth, glabrous, adaxial surface closely ribbed, scaberulous; ligule 2–4 mm. Panicle narrowly cylindrical, 4–7 cm, pale green, appearing villous from long slender awns, base often included in uppermost leaf sheath. Spikelets narrowly oblong, 2.5–3 mm; glumes membranous, smooth, keels and lateral veins ciliate, margins connate at base, apices obtuse; lemma equaling or slightly longer than glumes, margins connate below middle, awned from lower 1/4–1/3, apex obtuse; awn exserted 3 mm or more from spikelet, straight. Anthers orange, 0.4–0.8 mm. Fl. and fr. May–Jun. 2n = 14.

Damp sandy or muddy river banks and lake shores. Heilongjiang [Russia (Far East)].