杭州西湖山区种子植物区系的研究

杭州西湖 山区种子植物丰 富,共有 12 25 种 ( 包括栽培 42。种 ),隶属 于 756 属、15科;以 科、属、种为单位,对科的大小,属、种 的分布型,生活型等方面进行了 分 析,其结果表明:( 1) 该 区 系的热带、亚 热带和 暖温带、温带的特征显著,具有热带到温带分 布 的过渡性.( 幻 科、属 均以 单种和 寡种的为主:表 明植物区系的多样性.(3 ) 区 系 的主 要 成分以 落叶乔、灌木和草本植物的属 种居多,与本 区接近北 亚热带气侯带相符.( 4) 该 区 系以长江以 南广布型和华东区系成分为主,并与华中区 系关系较密切,而 与华北区系成 分 有一定 的联 系.(5 ) 特有植物贫泛,反映该区地形较为简单。

The Flora of the West Lake Mountainous Area in Hangzhou

The species of seed-plants on the West Lake mountainous area in Hangzhou are very rich. There are about 1 525 species (including cultivated plants) of Spermatophyte, which belong to 756 genera and 155 families. The size of families and genera, the distribution on pattern of genera and life-forms of species have been analysed. The results are summarized as follows: 1 . The floristic characters are conspicuous for temperate and tropical-subtropical element, which represents a transitional pattern of distribution from subtropical to temperate. 2 . The floristic diversity is revealed by the main component of small and monospecific taxa. 3 . The deciduous and herbareous genera as well as species are the main members of the flora, which is correspondent to the near climatic zone of north subtropical region. 4 . The floristic elements mainly consist of wide distribution to the south of the Yangtze River and the elements of East China. Besides the floristic elements are closely related to Central and North China. 5 . The less endemic species reflect that the topograph of the mountains is relatively simple.