湖南植物区系种子植物特有属的特征及其成因探讨

DISCUSSION ON THE FEATURES AND THE FORMING CAUSES OF ENDEMIC GENERA OF SEED PLANTS OF HUNAN FLORA

湖南植物区系有中国种子植物特有属65个,隶属于41个科,它们具有丰富性,古老性、热带亲缘关系和温带性质的特征。产生这些特征的原因主要有:①自三迭纪以来,具有相对稳定的地质历史;②是中国特有成分,东亚成分、东亚—北美成分的发详地;③是华东地区、华中地区和华南地区的交接地带。

Hunan flora includes sixty-five endemic yenera of seed plants,which are subordinated to forty- four families.Their endimicity are rich,antique,tropic amd temperate,result from,①the geological history in Hunan which has been relatiuely unchangeable since the Triassic Period;②China's peculiar composition;East Asia flora and Eastasia-North Ainerica flora originating from Hunan;③Hunan being the area in which East China,Central China and South China juin each other.