湖北大洪山种子植物区系的研究

报道大洪山有种子植物１０５２种，隶属５１６属１４７科，在分析主要科的地理分布和全部属的分布区类型的基础上，认为温带属占主导地位，还讨论了该地区与我国其它１０个不同纬度山区植物区系的关系，并通过植物区系的属相似性系数的对比分析，讨论了该区系与华东，华中和华北植物区系的关系，得到大洪山属于华东植物区系的结论。

ON THE FLORA OF DAHONG MOUNTAIN, HUBEI PROVINCE

Dahong Mountain is situated in North Central Hubei,which is a south branch range of Tongbo Mountains. The seed plant species and composition are very rich. According to the preliminary statistics,there are 147 families,518 genera and 1054 species in the region. Based on their geogrophical distribution types,in accordance with the analyses of all the distribution types,it is reasonable to conclude that:among the native genera in the flora of Mt.Dahong,284 are temperate,165 are tropical and 13 are endemic to China. The floristic relationships between this area and other 10 different latitude mountain area are also discussed. By means of the comparison of similarity coefficient of genera,floristic affinities between this flora and other three floras (floras of East China,Central China and North China)are closer,and Mt. Dahong belongs to the flora of East China. Mt.Dahong is also one of the ties among these floras.