河北省木兰围场自然保护区种子植物区系研究

对河北省木兰围场自然保护区90科371属793种种子植物区系进行了科属组成分析、生活型分析、分区类型及特征分析。结果表明,该区种子植物中大科大属较少,分别占该区植物总科数的10.0%、总属数的8.1%,小科小型属较多,含1~4种的科占该区总科数的58.9%,小型属及区域单种属则有327属,约占总属数的88.1%;分布区类型主要为世界分布、北温带分布和旧世界温带分布,植物区系具有典型的温带性质;草本植物在生活型方面占绝对优势,藤本植物最少。

Study on Seed Flora in Nature Reserve in Mulan Paddock of Hebei Province

A total of 793 species of seed flora belonging to 371 genera and 90 families were investigated in nature reserve in Mulan paddock in Hebei province.Their families and genera composition,life forms and distribution types and characteristics were analyzed.Results showed that there were few large families and large genera in seed plants,being 10% of total families and 8.1% of total genera in the seed plants in this area.There were many small families and small genera in seed plants.Families containing 1～4 species account for nearly 58.9% of the total families in this region.The small-sized genera and regional monotypic genera had 327 genera and accounted for nearly 88.1% of the total genera.Main distribution types were cosmopolitan distribution type,north temperate distribution type and old world temperate distribution types.The flora embodied the feature of temperate zone.Herbage was predominant on life forms,while liana was least.