桐柏山太白顶自然保护区种子植物区系初步研究

The Rreliminary Study on Spermatophyte Flora of Taibaiding Natural Reserve ( TBDNR ) in Tongbai Mountain

桐柏山太白顶自然保护区是我国山地混合生态系统自然保护区之一.地处北亚热带和南暖温带的过渡区,种子植物较为丰富,计144科,656属,1594种。通过对其科、属的15个分布类型和种的13个分布类型及28个变型初步分析,该区植物区系特点是:温带性质为主,热带成分也有相当多的存在;原始性、中国特有科的出现,少型、单型属的充足,说明了仍具一定的古老性;东亚、中国特有分布类型中,种具优势比重,体现占东亚及中国种子植物区系的显赫地位.

TBDNR is one of the natural reserves characterized by the mountainious mixed—ecosystem in china. It is located in the transitional region of south warm temperperate and north subtropics between Dabie Mts. and Funiu Mts.It's rich in spermatophyte 144 families,656 genera,1594 species.From a point of view of geography-distribution elements, all genera are divided into 15 distributional types and species into 13 distributional types. The flora features are complex, diverse, compatible and old in origin.It's mainly charactericed by East—Asia elements (genus 14%, species 33%) and temperate elements (genus 66.4%, species 15.9%). There also exist a lot of tropical elements (genus 31.3% species 8.1%).East—Asia and China peculiar elements of species (33.4%, 43%) are much more than that of genus (27.2%,6.6%).These elements take a great part in the flora of TBDNR.