陕西观音山自然保护区蕨类植物区系研究

Study on the pteridophyte flora of Guanyin Mountain Nature Reserve in Shaanxi Province

在调查的基础上,结合相关文献,对陕西观音山自然保护区蕨类植物区系进行了初步研究.结果表明:①种类较丰富,种系密度较大,本区有蕨类植物21科44属92种(包括种下类群);②优势科明显,大部分科内属、种贫乏;③温带性质显著,与热带蕨类植物区系有一定的亲缘关系;④地理成分多样,区系联系广泛;⑤区系具有一定古老性;⑥特有化程度较高,有38个中国特有种,以西南、华中和华北成分为主.

According to the investigated material and the collected documents, after a floristic analysis of the pteridophytes of Guanyin Mountain Nature Reserve, some conclusions are obtained, which are showed in the following. ① The pteridophytic flora in Guanyin Mountain have comparatively rich species and comparatively high species densities, and comprises 92 species, 44 genera, 21 families, ②a few families have a large number of genera and species, but in many families are only found rare genera and rare species, ③they show significant typical temperate features and have something to do with tropical peridophytes in genetic blood, ④they have diverse geographical elements and are wide relation to other regions, ⑤they are of antiquity to some extent, ⑥they are comparatively highly endemic, containing 38 Chinese endemic species mainly composed of the components from southwest China, central China and north China.