太白细柄茅Ptilagrostis concinna (Hook. f.) Roshev.

别名：致细柄草;优雅细柄茅;致细柄茅;

科名：禾本科 Gramineae

属名：细柄茅属 Ptilagrostis

《中国植物志》第9(3)卷311页
  2.太白细柄茅（秦岭植物志）图版77：8-14
  Ptilagrostis concinna (Hook. f.) Roshev. in Kom. Fl. URSS 2: 75. 1934;秦岭植物志1 (1): 154.图122. 1976. ——Stipa concinna Hook. f. Fl. Brit. Ind. 7: 230. 1897.
  多年生。须根细韧。秆直立，密丛，光滑，高10-30厘米。径约2毫米，具2节。叶鞘紧密抱茎、平滑；叶舌钝圆，长1-2毫米，粗糙，边缘下延与叶鞘边结合，秆生叶舌顶端微2裂，常呈紫色；叶片纵卷呈细线形，长5-15厘米，秆生者长1-2厘米。圆锥花序狭窄，长2-5厘米，宽1-2厘米，基部分枝处常具披针形膜质苞片，分枝长1-2厘米，细弱，贴向主轴直伸，多孪生；小穗柄平滑；小穗深紫色或紫红色，长4-5（6）毫米；颖膜质，宽披针形，光滑，几等长，第一颖具1脉，第二颖具3脉；外稃长3.5-4毫米，顶端2裂，背上部无毛而粗糙，基部被柔毛，基盘钝圆，长约0.5毫米，具短毛，芒长1-1.4厘米，全被柔毛，一回或不明显地二回膝曲，芒柱微扭转；内稃近等长于外稃，具2脉，脉间疏被毛；花药长约1.5毫米，顶端具毫毛。花果期7-9月。
  产甘肃、西藏、青海、陕西（秦岭北坡太白山）、四川西北部。生于高山草甸、山谷潮湿草地、山顶草地、山地阴坡、灌木林下、河滩草丛及沼泽地，海拔3700-5100米。锡金、喜马拉雅、苏联南部也有分布。模式标本采自锡金。

《Flora of China》 Vol. 22 (2006)
Ptilagrostis concinna  (J. D. Hooker) Roshevitz
太白细柄茅   tai bai xi bing mao
Stipa concinna J. D. Hooker, Fl. Brit. India 7: 230. 1896 ["1897"].
Perennial, densely tufted, old basal sheaths forming tight clusters. Culms 10–30 cm tall, 0.6–1 mm in diam., 2-noded. Leaf blades setaceous, 5–15 cm, abaxial surface smooth; ligule obtuse, 0.5–2 mm. Panicle contracted, 2–5 × 1–2 cm, lowest branches enclosed by a sheathing lanceolate membranous bract, smaller bracts present at base of some upper branches; branches usually paired, 1–2 cm, suberect, spikelets few. Spikelets dark purple or purplish red with white scarious apices; glumes elliptic, 4–6.3 mm, lower glume 1-veined, upper glume 3-veined, apex smooth, acute; lemma 3.5–5 mm, pilose below middle, scabrid above, apex 2-toothed, teeth 0.3–0.5 mm; awn 1–1.5 cm, plumose, hairs 1–1.5 mm, shorter toward apex, column loosely twisted; palea subequal to lemma, 2-veined. Anthers 1.5–2.2 mm, bearded at apex. Fl. and fr. Jul–Sep.
Alpine meadows, moist grassy places, under shrubs, swampy places, Kobresia moors; 3700–5400 m. Gansu, Qinghai, Shaanxi, Sichuan, Xinjiang, Xizang, Yunnan [India (Sikkim), Kashmir, Kyrgyzstan (Tien Shan), Tajikistan (Pamirs)].