紫溪山风景区被子植物区系成分分析

据统计在紫溪山风景区自然分布(少数几种为栽培)的被子植物669种，隶属129科390属，对其区系成分进行了统计分析，结果表明被子植物科的分布类型主要是以热带—亚热带分布型(34科，占27．13％)和热带—温带分布型(30科，占23．26％)为主。属的分布类型主要以泛热带分布型(107属，占27．43％)和北温带分布型(75属，占19．23％)为主。紫溪山风景区被子植物区系的显著特征有以下特点：①丰富的植物种类；②复杂、起源广泛的区系成分；③突出的热带、亚热带成分。

An analysis on the flora element of angiospermae in the scenic spot of Zixi mountain

According to the statistical data, there are 669 species of angiospermae in the natural distribution of the scenic spot(the minority of them are planted), all the species are subordinate to 129 familias, 380 genera. The analysis and statistics on the flora element show that the distribution pattern of the angiospermae familia is mainly characterized by the pattern of tropical?subtropical distribution (34 familias, 27.13%) and by the pattern of tropical?temperate of genus is mainly characterized by the pantropical distribution(107 genera, 27.43%)?north temperate zone distribution (75 genera, 19.23%). The obvious features of angiospermae flora in Zixi scenic spot are: 1) plentiful plant species; 2) complex, widely-originated flora element; 3) outstanding tropical?subtropical element.