别名：乌斯图－德日苏;毛颖羽茅;

科名：禾本科 Gramineae

属名：芨芨草属 Achnatherum

《中国植物志》第9(3)卷328页
  12．毛颖芨芨草（禾本科图说）
  Achnatherum pubicalyx (Ohwi) Keng ex P. C. Kuo, 秦岭植物志1 (1) : 153. 1976. ——Stipa pubicalyx Ohwi in Journ. Jap. Bot 17 (7) : 401. 1941. ——Achnatherum pubicalyx (Ohwi) Keng,禾本科图说590.图526, 1959, et中国高等植物图鉴5: 117, 1976. comb. illeg.
  多年生。秆直立，丛生，在花序下微粗糙，高60-100厘米，具3-4节，基部具有短鳞芽。叶鞘稍粗糙，上部者短于节间；叶舌长约1毫米，平截，顶端具裂齿，有时具纤毛；叶片边缘常内卷，长达40厘米，宽3-5毫米，上面密生短柔毛，下面粗糙。圆锥花序较紧缩，长15-25厘米，宽2.5-4厘米，主轴粗糙，分枝细弱，稍粗糙，斜向上升，2-4枚簇生，长2-7厘米，自基部着生小穗；小穗长8-9毫米，紫红色或浅褐色；颖膜质，近等长，长圆状披针形，第二颖顶端稍钝，背部贴生微毛，具3脉；外稃长6-7毫米，背部密被较长的柔毛，顶端齿裂不明显，具3脉，脉于先端汇合，基盘顶端较钝，长约0.8毫米，具毛；芒长2-2.5厘米，一回膝曲，芒柱扭转且具细短毛；内稃约与外稃等长，具2脉，脉间被柔毛；花药长约5毫米，顶端生毫毛。颖果纺锤形，长约5毫米。花果期7-9月。
  产黑龙江、吉林、内蒙古、青海、陕西（秦岭东段）、山西、河北。生于山坡草地及林下，海拔600-2700米。也分布于朝鲜。模式标本采自朝鲜北部。

《Flora of China》 Vol. 22 (2006)
Achnatherum pubicalyx  (Ohwi) Keng
毛颖芨芨草   mao ying ji ji cao
Stipa pubicalyx Ohwi, J. Jap. Bot. 17: 401. 1941; Achna-therum pekinense subsp. pubicalyx (Ohwi) T. Koyama.
Perennial, loosely tufted, scaly buds at base. Culms erect, 60–100 cm tall, scabrid under panicle, 3–4-noded. Leaf sheaths scabrid, lower longer than internodes; leaf blades flat, often involute at margins, up to 40 cm, 3–5 mm wide, adaxial surface densely pubescent, abaxial surface scabrid, apex finely acuminate; ligule truncate, ca. 1 mm. Panicle slightly contracted, 15–25 cm; branches 2–4 per node, ascending, with spikelets to base. Spikelets 8–9 mm, purple or brownish; glumes subequal or upper glume slightly longer, elliptic-oblong, 3-veined, appressed-puberulous, apex acute or obtuse; callus subacute, ca. 0.8 mm; lemma narrowly lanceolate, 6–7 mm, leathery, pilose, margins overlapping and enclosing palea, apex very slightly lobed; awn persistent, 2–2.5 cm, 1-geniculate, column twisted, minutely hispidulous, bristle scabrid. Anthers 4–5 mm, bearded at apex. Fl. and fr. Jul–Sep.
Grassy mountain slopes, forests; 600–2700 m. Gansu, Hebei, Heilongjiang, Jilin, Nei Mongol, Qinghai, Shaanxi, Shanxi, Xinjiang [Korea].
This taxon is a pubescent variant of the Achnatherum sibiricum-pekinense complex and is sometimes included within A. pekinense.