二滩水库区维管植物区系的研究

研究了二滩水库区的维管植物区系，有野生维管植物约１７６科，７０７属，１３９２种，其中蕨类植物１１４种，占总数的８．１９％，裸子植物２６种，占总数的１．８７％；被子植物１２５２种，占总数８９．９４％，从库区维管植物上生活型莱看，乔森林０９种，占总数的１５．０１；灌木２５１种，占总数的１８．０３％；草本８２５种，占总数的５９．２７％，藤本１０７种，占总数７．６９％，从二滩水库区种子植物科，属现代地理分

STUDIES ON THE FLORA OF TERRESTRIAL VASCULAR PLANTS IN ERTAN RESERVOIR AREA

The authors studied the flora of vascular plants in Ertan Reservoir Area.There are 1392 vascular plant species of 707 genera of 176 families,among which,114 species belong to pteridophyte,26 gymnosperma and 1252 angiosperma which account for 8.19,1.87 and 89.94 per cent of the total number of species respectively.As to the life forms,there are 209 species belonging to trees,251 shrubs,825 herbs and 107 liana,which account for 15.01,18.03,59.27 and 7.69 per cent of the total progressively.As for the modern geographical distribution of genera and families of seed plants,the tropical composition is more than the temperate composition of families,while in contrast of genera,which shows that,genera with single or few species and relic species of tropical distribution families are rich,and the flora is quite primitive.