龙溪—虹口自然保护区种子植物区系的初步研究

A Preliminary Floristic Study of Seed Plants in Longxi-Hongkou National Nature Reserve

龙溪—虹口国家级自然保护区有种子植物140科790属2 183种,地理分布区类型以温带分布植物为主,属于我国植物区系的温带成分。本地区区系古老,有不少的原始科属和孑遗种类;单型属和少型属较多,含10种以上的大科大属也十分丰富。科的分布类型有明显的北温带性质,其属和种的分布类型反映出典型的温带属性。

In the Longxi-Hongkou National Nature Reserve, seed plants are estimated at 140 families, 790 genera, and 2 183 species,and their geographic distribution types belong to the temperate flora which is characterized by the domination of temperate flora components. The flora is of ancient origin, consisting of many primitive families and genera, and relic species. There are many monotypic and oligotypic genera, and relatively large families and genera with more than 10 species are also common. The distribution of families ,as well as genera and species, exhibits evident temperate characteristics.