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作 者 ：苏旭,刘玉萍,李兆孟,周勇辉,陈克龙,陈文俐

期 刊 ：植物研究 2015年 35卷 3期 页码：321-326

关键词：禾本科；固沙草属；西藏固沙草；形态性状；叶表皮微形态；

Keywords:Poaceae, Orinus, Orinus tibeticus, morphological character, morphology of leaf epidermis,

摘 要 ：通过形态学性状的观测、统计和叶表皮微形态特征的分析，比较了西藏固沙草、固沙草和鸡爪草3个近缘物种的主要性状差异，以探讨西藏固沙草的系统分类归属。结果显示，在外部形态上西藏固沙草与固沙草差异甚小，难以进行区分，但与鸡爪草差异明显，是典型的种间关系；在叶表皮微形态解剖上，西藏固沙草的绝大多数特征与固沙草的一致或类同，可与鸡爪草却存在明显间断。故研究认为，西藏固沙草与固沙草是同一个种，西藏固沙草应作为固沙草的异名。

Abstract:We analyzed the main character differences among nearest related Orinus tibeticus, O.thoroldii and O.anomala in the genus Orinus by morphological observation and anatomical analysis of leaf epidermises. There was very slight disparity between O.tibeticus and O.thoroldii in external morphology, and classifying two species was difficult. The differences between O.tibeticus and O.anomala were distinct, and two taxa were two different species. Anatomically, the most features of O.tibeticus were consistent with or similar to that of O.thoroldii, while for O.anomala, the discontinuity of characters between them was obviously present. Therefore, O.tibeticus and O.thoroldii should belong to the same species, and O.tibeticus can be reduced to synonymy of O.thoroldii.

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