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作 者 ：赵杏花1，蓝登明1*，左合君1，郭建英2

期 刊 ：西北植物学报 2012年 6期 页码：1245~1253

关键词：种子植物；地理成分；生活型；水分生态类型；相似性；

Keywords:seed plants, geography element, life style, water ecotype, similarity,

摘 要 ：通过对阴山山脉乌拉山段种子植物区系进行调查、统计、排序，从科、属、种3个分类等级上对植物的地理分布类型、生活型、水分生态类型分别进行统计分析，并与内蒙古种子植物区系进行对比分析。结果表明：（1）乌拉山有野生种子植物67科，227属，426种，其中，裸子植物3科，5属，7种；双子叶植物58科，187属，345种；单子叶植物6科，35属，74种；（2）从地理成分来看，温带成分占绝对优势；生活型以草本植物占绝对优势；从水分生态类型看，中生植物是该区的主要成分，旱生植物在本区系也占有相当比重，说明该地区水分条件较差，在气候区上属于半干旱地区;（3）与毗邻山地植物区系的相似性分析表明，乌拉山植物区系与九峰山、大青山种子植物区系具有很近的亲缘关系，与狼山亲缘关系较远。

Abstract:Taking the flora of Wula Mountain as study object,we analyzed geography distribution,life styles,water ecotypes of seed plants here from taxonomic grade of families,genera and species.The results compared with the flora of Inner Mongolia.The conclusions are as follows:(1)There are 426 species of seed plants in Wula Mountain,which belong to 227 genera and 67 families.Among them there are 3 families,5 genera,7species in Gymnosperm;58 families,187 genera,345 species in Dicotyledon and 6 families,35 genera,74 species in Monocotyledon.(2)Temperate components are dorminant.Herbage is dominant in life style.In water ecotype,the mesophyte is most primary,the xerophile is primary either.That means the water condition is worse and here is semi drought area.Compared with the flora of Lang Mountain,Jiufeng Mountain and Daqing Mountain,the kindred relationship between them were analyzed:the flora of Wula Mountain has near kindred relationship with Daqing Mountain in families and genera,with Jiufeng Mountain in species,but not with the flora of Lang Mountain.

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