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Bulletin of Botanical Research ›› 2015, Vol. 35 ›› Issue (3): 321-326.doi: 10.7525/j.issn.1673-5102.2015.03.001

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Reduction on Orinus tibeticus Based on the External Morphology and Micromorphological Characteristics of Leaf Epidermis

SU Xu1,2;LIU Yu-Ping3;LI Zhao-Meng1,2;ZHOU Yong-Hui1,2;CHEN Ke-Long4;CHEN Wen-Li5*   

  1. 1.Key Laboratory of Physical Geography and Environmental Process in Qinghai Province,College of Geography and Life Science,Qinghai Normal University,Xining 810008;
    2.Key Laboratory of Plateau Crop Germplasm Innovation and Utilization of Qinghai Province,Qinghai University,Xining 810016;
    3.Department of Ideological and Political Theory Teaching and Research,Qinghai Normal University,Xining 810008;
    4.Science and Technology Department,Qinghai Normal University,Xining 810008;
    5.State Key Laboratory of Systematic and Evolutionary Botany,Institute of Botany,Chinese Academy of Sciences,Beijing 100093
  • Online:2015-05-20 Published:2015-06-24
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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.

Key words: Poaceae, Orinus, Orinus tibeticus, morphological character, morphology of leaf epidermis

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