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作 者 ：宋建中;李博

期 刊 ：武汉植物学研究 1991年 9卷 2期 页码：161-168

关键词：种子植物区系；地理分布；区域性特征；木林子；川尔-鄂西；

Keywords:Spermatophyte flora, Geographical distribution, Regional characteristic, Mulinzi Nature Conservation, E. Sichuan-W. Hubei,

摘 要 ：本文研究了鄂西木林子种子植物区系的地理分布,并探讨了川鄂山地的区域性特征。木林子区系现知种子植物共134科、488属、约1043种(包括种下分类单位,下同)。本区系10个东亚特有科中有6科的分布边界止于川鄂山地,3科盛产于川鄂山地。约141属的分布区明显集中于川鄂山地或以川鄂山地为其主要分布区之一,约占该区系488属的28.9%。有52属的分布边界限于川鄂山地,另有27个百种以上大属的分布在川鄂山地呈急剧减少的态势。本区系以川鄂山地为主要分布区的有131种,占全部种数的12.56%,其中仅分布于川鄂山地的就有36种;还有约270种的分布边界止于川鄂山地。川鄂山地独特生境的阻限和对植物种系发生的诱发作用,是形成这种地理分布格局的重要原因。

Abstract:The geographical distribution of spermatophyte flora of Mulinzi Nature Conservation in W. Hubei is studied in this paper. The regional characteristics of E. Sichuan-W. Hubei mountainous area are also discussed. It’s now known that there are 1043 species(including subspecies and varieties, the same as below) of 488 genera among 134 families in Mulinzi Sperma. Flora. There are 6 families whose distributive boundaries lie in E. Sichuan-W. Hubei mountainous area among 10 endemic families of E. Asia in Mulinzi flora. 141 genera (about 28.9% in genera of the flora) distribute obviously in the area. In addition, the distributive boundaries of 52 genera are situated in the area, the distributions of 27 big genera (over 100 species per genus) are been decreasing abruptly. There are 131 species (about 12.6% in species of the flora) being mainly distributed over the area in the flora. The distributive boundaries of about 270 species are in the area. The separation and environment affecting plant speciation of E. Sichuan-W. Hubei mountainous area are important factors of forming the distributive characteristics.

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