别名：曹日都-乌纳根-苏乐;

科名：禾本科 Gramineae

属名：看麦娘属 Alopecurus

《中国植物志》第9(3)卷263页
  8.长芒看麦娘（东北植物检索表）
  Alopecurus longiaristatus Maxim. in Mem. Pres. Acad. Sci. Petersb. 9: 327. 1859; Ovczinn. in Kom. Fl. URSS 2: 157. 1934; Kitag. Lineam. Fl. Mansh. 60. 1939;刘慎谔等, 东北植物检索表488.图版179: 8. 1959; Tzvel. Poac. URSS 380. 1976.
  一年生。秆少数丛生，细瘦，光滑，节处有时膝曲，高15-30厘米。叶鞘短于节间，松弛，上部者有时膨大；叶舌膜质，长2-4毫米；叶片扁平，质薄，长3-9厘米，宽1-2毫米。圆锥花序圆柱状，长4-7厘米，下部包于叶鞘中；小穗椭圆形，长约3毫米；颖基部连合，具3脉，脊与脉上具纤毛；外稃膜质，具3脉，芒自稃体基部伸出，膝曲，长5-8毫米，芒上小刺向上；花药橙黄色，长约0.8毫米。颖果长约1.5毫米。花果期5-7月。
  产我国东北地区。生于湿地。在苏联远东地区也有分布。模式标本采自黑龙江。

《Flora of China》 Vol. 22 (2006)
Alopecurus longearistatus  Maximowicz
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)].