青藏高原特有属——固沙草属(禾本科)2个类群的修订

固沙草属(Orinus)是禾本科(Poaceae)中一个具有重要经济价值的高山特有属,共记载6个物种,它们均具有较强的抗逆特性,是农业良种繁育、畜牧业牧草改良利用的重要资源,但固沙草属物种形态差异不显著,种间界限较模糊。该研究通过标本研究、野外考察、形态性状分析以及实验的观察研究,对固沙草属2个类群进行了分类修订,将长颖固沙草(O.longiglumis)和西藏固沙草(O.tibeticus)以及高秆固沙草(O.alticulmus)和鸡爪草(O.anomala)分别处理为固沙草(O.thoroldii)和青海固沙草(O.kokonorica)的新异名。

Taxonomic Notes on Two Taxa of Orinus (Poaceae), an Endemic Genus from the Qinghai Tibet Plateau

Orinus is an alpine genus with important economic values in the grass family (Poaceae). There are six species in it and all of them have stronger adverse resistant characteristics, and they are the important resources for improving and applying agricultural breeding and animal husbandry. Meanwhile, the discriminative characters are obscure among these species. Two taxa of Orinus (Poaceae) from the Qinghai Tibet Plateau are taxonomically revised on the basis of herbarium materials, field observation, generalized morphological analysis and laboratory examination. O. longiglumis and O. tibeticus, O. alticulmus and O. anomala are reduced to synonyms of O. thoroldii and O. kokonorica.