浙江磐安种子植物区系的特征分析

磐安约有野生种子植物 1 44科 ,62 7属 ,1 2 98种 (包括种以下分类单位 )。其中世界成分的属 67个 ,占总属数的 1 0 .69% ,热带属 2 2 7个 ,占 36.2 0 % ,温带属 32 1个 ,占 5 1 .2 0 % ,中国特有属 1 2个 ,占 1 .91 %。磐安气候温暖湿润 ,植物种类丰富 ,古老、孑遗、珍稀植物多 ,单种属和少种属占有较大比重 ;优势科、优势属明显 ,优势科 34个 ,共含有 393属 ,776种 ,分别占总属数总种属的 62 .7% ,70 .3% ,优势属 1 0个 ,共含有 1 44种 ,分别占总属数总种数的 1 .6% ,1 1 .1 % ,其中樟科、壳斗科等是该区系的表征科 ;植物分布类型多样 ,地理成分复杂 ,温带成分和热带成分占优势 ,是亚热带分布的北缘 ,与世界各地有广泛的联系

Analysis on characteristics of Pan'an seed plants flora in Zhejiang Province

There are 1 298 species of wild seed plants,belonging to 627 genera and 144 families in Pan’an area. Among the areal-types of the genera,67 of them are cosmopolitan genera(10.69%),227 ones are tropical distribution(36.20%),321 ones are temperate distribution (51.20%),12 ones are endemic to China distribution (1.91%). The climate in Pan’an is warm and moist,the plant variety is rich,one-genera family and fewer genera family are abundant;there are ancient,relict,rare and nearly exterminate plants which the dominant families and genera are prominent;the types of distribution are various and geographical composition are complex,temperate and tropical parts are dominant,they are in wide connection with the flora of world.