青海鹅观草属的叶片表皮微形态特征及其分类意义的探讨

通过青海鹅观草属叶片表皮的解剖观察，结合外部形态，表明了该属植物在小麦族中共族分属的合理性，同时对青海地区属下类群重新进行了确认，共划分2组16种，即拟技碱草组，包括6种；弯穗草组，包括10种．过去处理的种短柄鹅观草和多秆鹅观革分别作为短颖鹅观草和缘毛鹅观草的变种。此外，类群间的演化水平和属的地理起源也作了初步探讨。

STUDIES ON THE LEAF EPIDERMIS IN ROEGNERIA C. KOCH FROM QINGHAI AND ITS TAXONOMICAL SIGNIFICANCE

In the present paper,anatomic examinations are made on the leaf epidermis ofRoegneria C. Koch from Qinghai. With the viewpoint of combining external morphologyg,therationalities of the dividing genera and the coexisting in the tribe Triticeae of RoegneriaC. Koch are discussed,the taxa below the genus in Qinghai confirmed. The results showthat the genus Rocgneria from Qinghai may be divided into two sections and sixteenspecies, namely: Sect. 1. Roegneria, including 6 species; Sect. 2. Curvata (Nevski ) H. L.Yang, including 10 species. The species of the past treatment, R. brevt'Pes Keng and R.multi'culmis Kitag.,are reduced to R. breviglumis Keng or R. pendulina Nevskirespectively as a new variety. In addition,the evolutionary levels of the taxa and thegeographical origin of Roegneria C. Koch also are studied roughly.