河南小秦岭自然保护区种子植物区系初步研究

Study on the Floristic Spermatophyte of Xiaoqinling Natural Reserve(XQLNR) in Henan

小秦岭自然保护区位于豫陕交界处,属秦岭山脉向东北延伸的部分。其自然地理条件优越,植物种类繁多。木文对现代植物区系中117科、589属、1679种种子植物进行了统计分析,划分为科的10个分布类型、属的15个分布类型及种的14个分布类型和24个亚型。结果表明:本区系属温带性质,热带成分也有一定比例的存在;东亚成份在本区系中地位显赫,且富含单、少型属及原始类型;本区系归属于华北植物区系,与华中、西南等植物区系也有广泛联系;本区系与秦岭(特别是其北坡)植物区系有密切联系,含有较多的共同特有种;本区有特有种存在,属古特有现象。

XQLNR is located between Henan and Shanxi Province, belonging to the branch of Qinling Mts stretching northeast. It is rich in spermatophyte because of the advantages of its physiographic conditions. Based on the statistical study on 117 families, 589 genus and 1679 species in the present vegetation, all families are divided into 10 distributional types, genus into 15 and species into 14 distributional types and 24 subtypes. The flora shows temperate characteristic with some tropical elements, rich in ancient monotypic or oligotype genus and primitive types. The flora contacts closely with Qinling Mts.,especially with its north slope, and there are a lot'of common endemic species between them, there exists ancient endemic phenomenon (endemic species) in the flora.