中文摘要：

本文报道了发现于甘肃玉门大山口上二叠统肃南组华夏和安加拉混生植物群,含16属26种。根据植物分子的组成,植物群的时代属于晚二叠世早期,相当于二叠纪（三分）的吴家坪期（Wuchiapingian）。这些保存颇佳的植物化石对于研究华夏和安加拉两个植物区系的关系提供了新的依据,具有重要的古植物地理学意义。

英文摘要：

The fossil plants in this paper were collected from the Sunan Formation of Late Permian in Yumen of Gansu Province, China. The flora is composed of 26 species in 16 genera and it contains many Angaran elements and some Cathaysian elements, which represents a mixed Cathaysian—Angaran flora. On the basis of the floral composition, the geological age of the flora belonged to the early Late Permian, corresponding approximately to Wuchiapingian. The flora provides new evidences for the relationship between the Cathaysian flora and the Angaran flora and it has important palaeophytogeographic significances.