云南大中山种子植物区系特征分析

云南省大中山有种子植物749种,隶属于137科,396属.区系成分中,世界分布33属,占总属数的8.33%;热带分布206属,占除世界分布属以外的56.75%;温带分布148属,中国特有9属.该地区植物种类丰富,古老、孑遗植物多,优势科、优势属明显,其中樟科、壳斗科、山茶科等是该区系的表征科;种子植物区系起源古老,地理成分复杂,具有明显的亚热带特性.

Study on Flora of Seed Plants from Dazhong Mountain in the South-central Yunnan Province

There are 749 species of seed plants in Dazhong Mountain,belonging to 396 genera and 137 families.Inside the flora,there are 33 cosmopolitan genera,accounting for 8.33% of the total.Excluding the cosmopolitan genera,there are 206 tropical genera that accounts for 56.75% of the total 148 temperate genera,which accounts for 40.77% of the total,and 9 genera endemic in China,which accounts for 2.48% of the total genera.It was concluded that this region is rich in plant species with plenty of ancient species and relict plants,and in which the dominant families and genera are prominent.The representative families of the flora are Lauraceae,Fagaceae and Theaceae.It was showed that the characteristics of the seed plant flora in Dazhong Mountain were of ancient genesis with complicated floristics,and there was a striking subtropical feature showed by the flora.