摘 要 ：对青海禾本科一新种——昂赛披碱草（Elymus angsaiensis S. L. Lu et Y. H. Wu）进行了形态描述和图解。该种与黑紫披碱草（E. atralus(Nevski) Hand.-Mazz）相近，但本种的叶鞘顶端两侧具披针形叶耳；穗状花序较疏松；小穗具小穗柄长约1 mm，且具微毛；颖片窄披针形, 长4～5 mm；花药黄色或黄绿色，长约1.5 mm，可以区别。
Abstract:Elymus angsaiensis S. L. Lu et Y. H. Wu, a new species of Gramineae from Zadoi County, Qinghai Province, is described and illustrated. The new species is related to Elymus atralus(Nevski) Hand.-Mazz. But it is distinguished by it with auricles on top at the both sides of sheath. Spike is loose; spikelet with pedicel 1 mm long, the pedicel with pubescences; glumes are narrow lanceolate, 4-5 mm long; anthers is yellow or yellow-green, 1.5 mm long.