凭证标本 meaning in English

voucher specimens

In this paper , the taxonomical problems of tulipa l . from china were studied based on the results of both the field observation and the examination of herbarium specimens , and the analysis of leaf epidermis morphology , pollen morphology , seed coats micromorphology and comparative embryology . the main results are as follows : ( 1 ) tulipa l . from china is taxonomically revised . there are 16 species distrubuted in china and tulipa kuocangshanica d . y . tan , x . r . li et d . y . hong is described as new
本文通过野外调查及凭证标本的考证，并结合叶表皮形态、花粉、种皮的微形态及比较胚胎学等方面的观察，对国产郁金香属植物分类中存在的问题进行了研究，主要内容如下：（ 1 ）对国产郁金香属植物进行了了修订，确认了国产郁金香属植物共有16种，其中新种1个: tulipakuocangshanicad . y . tanx . r . lietd . y . hong 。