湖北利川市种子植物区系研究

根据调查和统计,利川市共有野生种子植物145科750属2028种,其中裸子植物6科19属24种,被子植物139科731属2004种,木本植物1002种,草本植物1026种;本区系具有古老、孑遗、原始性,单种属和寡种属数量多;分布类型多样,地理成分复杂,仅属有15个分布类型和21个变型,科的热带成分占61.62%、温带成分占36.36%,属的热带成分占39.05%,温带成分占55.62%。利川种子植物区系具有以温带为主的亚热带性质。

Study on the flora of the seed plants from Lichuan of Hubei

According to investigation and statistics,there are 2 028 species of wild seed plants among them,1 002 species of woody plants and 1 026 species of herb,which belong to 750 genera and 145 familes,including 24 species of gymnosperms belonging to 19 genera and 6 families,and 2 004 species of gymnosperms belonging to 731 genera and 139 families;The flora is archaic,relic and pristine;single-species and few-species genera are rich.The types of distribution are various and geographical elements are complex,there are 15 types and 21 subtypes for genera of seed plants in this area.The amount of tropical families is 61.25%,and the amount of temperate families is 36.36%.The amount of tropical genera is 39.05%,and the amount of temperate families is 55.62%.According to this analysis,this flora shows temperate and subtropical in nature,but the temperate elements are superior.