科名：禾本科 Gramineae

属名：早熟禾属 Poa

《中国植物志》第9(2)卷213页
  203．希萨尔早熟禾（拟）
  Poa hissarica Roshev. in Acta Inst. Bot. Acad. Sci. URSS 1: 11. 1934. et in Kom. Fl. URSS 2: 416, Pl. 31. fig. 14. 1934. et in Fl. Kazakh 1: 235. 1956.
  多年生。具短匍匐根状茎，秆丛生，直立，高20-40厘米，上部裸露，平滑，下部为叶鞘所包藏。叶舌长约1毫米，先端钝圆；叶片狭窄，扁平或对折，宽约2毫米，上面粗糙，分蘖叶多数密集于秆基。圆锥花序金字塔形，疏松，长5-10厘米；分枝长约5厘米，平滑，上端微粗糙，着生1-3枚小穗；小穗长7-10毫米，宽约4毫米，含4-6小花，带紫色；两颖不等，第一颖长2.5-3毫米，第二颖长3-3.5毫米；外稃长3.5-4毫米，间脉不明显，全无毛，基盘无绵毛；内稃稍短，两脊微粗糙；花药长2毫米。花期6-7月。
  产新疆。生于高山石质草坡，海拔3700-4000米。分布于俄罗斯、中亚、帕米尔、天山。模式标本采自俄罗斯。

《Flora of China》 Vol. 22 (2006)
Poa hissarica  Roshevitz ex Ovczinnikov
希萨尔早熟禾   xi sa er zao shu he
Poa laudanensis Roshevitz ex Ovczinnikov.
Perennials, densely tufted, with or without short lateral shoots; shoots extravaginal and intravaginal. Culms few to several per tuft, erect or obliquely ascending, (10–)15–40 cm tall, 0.5–0.8 mm in diam., smooth, nodes 2 or 3, 1 or 2 exserted, uppermost to 1/4 way up, base enclosed by persistent pale brown leaf sheaths. Leaf sheaths smooth, glabrous, 3–9 cm, 4–5 × as long as blade, uppermost closed for 1/3–2/3 of length; blades folded with margins inrolled or not, moderately papery to thickly papery, ca. 2 mm wide, abaxially smooth, adaxially smooth or sparsely scabrid, margins scabrid, longest intravaginal ones to 3–8 cm; ligule 1–2 mm, abaxially smooth or sparsely scabrid, margin dentate to lacerate, sometimes ciliolate, apex truncate to obtusely rounded, collars smooth, glabrous. Panicle loosely contracted or open, erect, exserted, (3–) 4–10 × 3–7 cm; branches spreading, straight or slightly flexuous, 2 per node, slender, rounded and smooth throughout or distally slightly angled and pedicels sparsely scabrid, longest (1.2–)2–5 cm with 1–5 spikelets in distal (1/3–)1/2. Spikelets ovate, tinged pale purple, (4–)5–8(–10) mm, florets (2–)3–6; vivipary absent; rachilla internodes 0.8–1.2 mm, smooth, glabrous; glumes unequal to subequal, very thinly papery, shiny, smooth or keel sparsely scabrid distally, lower glume (2–)2.5–3.5 mm, 1- or 3-veined, upper glume 3–4 mm, 3-veined; lemmas ovoid to broadly lanceolate, 3–4.8 mm, intermediate veins indistinct, smooth throughout to sparsely and finely scabrid on and along margins, glabrous throughout, margins broadly membranous, apex obtuse to acute; callus glabrous; palea smooth, glabrous between keels, keels medially scabrid to ciliate, distally scabrid. Anthers ca. 2 mm. Fl. and fr. Jun–Jul.
Alpine moist rocky grassy slopes; (2800–)3700–4000 m. Xinjiang [Kazakhstan, Kyrgyzstan, Tajikistan, Uzbekistan].
Poa hissarica is possibly endemic to the W slope of the C Asian Republics, but one specimen from Xinjiang (Tian Shan, 2800 m), with very sparse callus web and very sparsely hispid between the lemma veins, is close to this species. Perhaps P. hissarica would be better treated as a subspecies of P. lipskyi.