尼木早熟禾Poa nimuana C. Ling

科名：禾本科 Gramineae

属名：早熟禾属 Poa

《中国植物志》第9(2)卷151页
  97．尼木早熟禾（植物分类学报）图版19：6
  Poa nimuana C. Ling in Acta Phytotax. Sin. 17(1): 103, 图1. 1983; 西藏植物志5: 115, 图51. 1987.
  多年生，疏丛生。秆高10-15厘米，直径约1毫米，基部常膝曲，具2节，紧接花序之下微粗糙。叶鞘长于节间，顶生叶鞘通常位于秆之中部以下，微粗糙；叶舌膜质，长2-4毫米；叶片长3-6厘米，宽1-1.5毫米，对折或边缘内卷，两面粗糙。圆锥花序开展，长4-7厘米，宽1.5-2.5厘米，分枝每节2枚，纤细，蜿蜒状，粗糙，下部1/2裸露；小穗倒卵形，带紫色，长3.5-5毫米，含2-4小花；颖披针形，顶端渐尖，脊上粗糙，第一颖较狭，长2.5-2.75毫米，具1脉，第二颖长3-4毫米，具3脉；外稃长圆形披针形，顶端尖或钝，上部边缘膜质，具5脉，脊和边脉中部以下具短柔毛，脉间粗糙，基盘无毛，第一外稃长约3毫米；内稃稍短于外稃，脊上粗糙；花药长约1毫米。花果期6-8月。
  产西藏（尼木）。生于山顶草地，海拔5300米。模式标产西藏尼木。
  本种在体态上与锡金早熟禾P．sikkimensis相似，但植株较矮，外稃的脊和边脉下部具短柔毛，花药长约1毫米。

《Flora of China》 Vol. 22 (2006)
Poa hirtiglumis var. nimuana  (C. Ling) Soreng & G. Zhu
尼木早熟禾   ni mu zao shu he
Basionym: Poa nimuana C. Ling, Acta Phytotax. Sin. 17(1): 103. 1979; P. macrolepis Keng ex C. Ling; P. zhong-baensis C. Ling.
Culms 0.6–1.5 mm in diam., 1–3 nodes. Lower leaf sheaths finely scabrid, uppermost closed for 1/4–2/5 of length; ligule smooth to sparsely scabrid. Longest panicle branches 2–7 cm with up to 5–11 spikelets in distal 1/2–2/3. Spikelets 3–5(–6) mm; rachilla internodes smooth or sparsely scabrid; upper glume (2–)3–5(–6) mm; lemmas (2.5–)3–4(–5) mm, keel villous for 1/2 of length, marginal veins to 1/3, surfaces scabrid or sparsely pilulose near base; palea minutely bumpy between keels, keels scabrid for 1/4–2/3 of length, glabrous. Fl. and fr. Jun–Aug.
* Grassy places on mountain tops, riverside fields, roadsides, frigid alpine crevices, frost scars, marshy ground; 3000–5500 m. Gansu, Qinghai, Sichuan, Xizang.
Poa hirtiglumis var. nimuana differs from var. hirtiglumis in the scabrid palea keels and glabrous and more scabrid lemma sides. Poa macrolepis is a taller form with larger spikelets, but there is nothing else to distinguish it from P. hirtiglumis. Poa zhongbaensis is a shorter, smaller-spikeleted form that may be better placed in P. szechuensis var. rossbergiana.