摘要
系统研究了黑龙江省伊春红山地区晚二叠世红山组植物群,认为其性质为华夏—安加拉混生植物群。华夏植物区与安加拉植物区的界限,应以内蒙古陆及其东、西延展部分为界。
About 58 species of 25 genera of fossil plants are discribed by the writers from the Hongshan Formation in Hongshan area, Yichun and then enrich the content of fossil plants in this formation. Among this flora, 25 species of 13 genera are reported here for the first time. After analysing the materials obtained, the writers further state the compositional characteristics of the flora, and consider that this flora of Hongshan Formation is Cathaysian-Angara mixed one.About the boundary of the Angara floristic province and the Cathaysian floristic province, there were different ideas in the past. Based upon the understanding of the Late Palaeozoic palaeogcography and the distribution of the floras , the writers have considered for a long time that the Neimong land and its eastward and westward extensions are the boundary. This land controlls the climatic conditions and the bioprovinces of the Southern and the Northern sides for a long period up to now. Along the both sides of the land, two floras arc mixed.
关键词
混生植物群
华夏
植物区
安加拉
the mixed flora, the Cathaysian floristic province, the florisvic Angara province
