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作 者 ：苏旭

期 刊 ：西北植物学报 2008年 7期

关键词：禾本科；披碱草属；无芒披碱草；形态变异；叶片微形态；

Keywords:Poaceae, Elymus, Elymus sinosubmuticus, morphological variation, micromorphology of leaf blades,

摘 要 ：通过形态学观测和叶片解剖特征分析,比较了无芒披碱草、短芒披碱草及老芒麦3个近缘种的主要性状差异,以探讨无芒披碱草的系统分类归属.结果表明,在外部形态上无芒披碱草与短芒披碱草差异甚小,难以进行区分,但与老芒麦差异明显,是典型的种间关系;在叶片解剖上,无芒披碱草的绝大多数特征与短芒披碱草的一致或类同,可与老芒麦的却存在明显间断.故研究认为:无芒披碱草与短芒披碱草是同一个种,无芒披碱草应作为短芒披碱草的异名.

Abstract:The main character differences among nearest related Elymus sinosubmuticus,E.breviaristatus and E.sibiricus in the genus Elymus were compared by the methods of morphological observation and anatomical analysis of leaf blades.The results show that there is

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