【摘要】 统计七老图山地区植物区系,分析其种子植物组成和地理分布特征,得出如下结论:七老图山有野生种子植物82科323属726种,包括裸子植物2科5属16种,被子植物79科318属710种;地理成分复杂,科、属、种都以温带成分为主,在区系总数中占比分别为78.8%、79.6%、63.9%;从水分生态类型可以看出,本区系中生植物最多,共591种,在总种数中占比82.4%,旱生植物次之,共182种,在总种数中占比25.4%;按生活型划分可以看出,草本植物数量在本区系种子植物中占有绝对优势,尤其以多年生草本为主导,构成了七老图山植物区系的主体部分;七老图山植物区系与雾灵山植物区系具有更近的亲缘关系,其次是坝上高原植物区系,但同时也与二者存在一定的差异。更多还原

【Abstract】 The species composition and geographical distribution of the flora of Qilaotu Mountains were statistically analyzed and the following conclusions were drawn.( 1) There are 726 species belonging to 323 genera and 82 families,including 2 families,5 genera and 16 species of gymnosperms,and 79 species,318 genera and 710 species of angiosperms.( 2) The geographical elements are complex,but the families,genera and species are mainly temperate components,accounting for 78.8%,79.6% and 63.9% of total,respectively.( 3) From the water ecological types,it can be seen that mesophytes count the most in this flora,including 591 species,accounting for 82.4% of the total species,followed by xerophytes,including 182 species,accounting for 25.4%.( 4) At the aspect of life types,herbaceous plants have an absolute advantage in this flora,especially the perennial herbs.( 5) The flora in Qilaotu Mountains has the highest phylogenetic relationship with that in Wuling Mountains,and then with that in Bashang Plateau.更多还原