茅根Perotis indica (Linn.) Kuntze

科名：禾本科 Gramineae

属名：茅根属 Perotis

《中国植物志》第10(1)卷124页
  2. 茅根（植物名汇）
  Perotis indica (L.) Kuntze, Rev. Gen. Pl. 2: 787. 1891; Merr. in Lingnan Sci Journ. 5: 29. 1927; Bor, Grass. Burm. Ceyl. Ind. et Pakist. 611. f. 72. 1960;台湾的禾草433. 图112. 1975; 海南植物志4: 393. 1977, p. p.: 台湾植物志5: 496. 图1048. 1978——Anthoxanthus indicum L. Sp. Pl. 28. 1753——Saccharum spicatum L. l. c. 54. 1753——Perotis latifolia Ait. Hort. Kew 1: 85. 1789; Benth. Fl. Hongk. 418. 1861.
  一年生或多年生草本。须根细而柔韧。秆丛生，基部稍倾斜或卧伏，高20-30厘米。叶鞘无毛，基部者常跨覆，上部者稍短于节间；叶舌膜质，长不及0.5毫米；叶片披针形，质地稍硬，扁平或边缘内卷，长2-4厘米，宽2-5毫米，顶端尖，基部最宽，微呈心形而抱茎，无毛，或仅边缘疏生纤毛。穗形总状花序直立，长5-10厘米，穗轴具纵沟，小穗脱落后小穗柄宿存于主轴上；小穗（不连芒）长2-2.5毫米，基部具0.2-0.3毫米的基盘；颖披针形，顶端钝或尖，被细小散生的柔毛，中部具1脉，自顶端延伸成1-2厘米的细芒；外稃透明膜质，具1脉，长约1毫米，内稃略短于外稃，具不明显的2脉；花药淡黄色，长约0.6毫米，花柱2，柱头帚状。颖果细柱形，棕褐色，长约1.8毫米。花果期夏秋季。
  产台湾、广东、海南；生于平原溪边、岸旁湿润草地中。分布于印度、斯里兰卡、缅甸、马来西亚及印度尼西亚。模式标本采自印度南部。

《Flora of China》 Vol. 22 (2006)
Perotis indica  (Linnaeus) O. Kuntze
茅根   mao gen
Anthoxanthum indicum Linnaeus, Sp. Pl. 1: 28. 1753; Sac-charum spicatum Linnaeus.
Annual. Culms loosely tufted, erect or decumbent at base, 20–30 cm tall. Leaf sheaths usually glabrous; leaf blades lanceolate to narrowly ovate, flat or margins involute, tough, 2–4 cm, 2–5 mm wide, glaucous, glabrous, margins spiny-scabrous especially near base, apex acute; ligule ca. 0.5 mm. Inflorescence up to 12 cm; spikelets usually densely arranged, ascending or horizontally spreading; rachis scabrous. Spikelets 1.5–2.5 mm (excluding awns); basal callus 0.2–0.5 mm, subacute; glumes narrowly lanceolate, back uniformly hirtellous with short white hairs, midvein scabrous, apex obtuse, clearly demarcated from awn; awn 1–1.5 cm; lemma 0.5–1 mm. Anthers ca. 0.3 mm. Caryopsis terete, narrowly ellipsoid, 1–1.8 mm.
Stream banks, roadsides, other weedy places, on sandy soil. Guangdong, Hainan, Shandong, Taiwan, Yunnan [Bhutan, Cambodia, India, Indonesia, Laos, Malaysia, Myanmar, Nepal, Philippines, Sri Lanka, Thailand, Vietnam; Africa (probably introduced), Australia (Queensland)].