江西三清山维管束植物区系分析

Floristic Analysis on Vascular Plants of Sanqingshan Mountain in Jiangxi Province

三清山位于赣东北怀玉山脉东端,维管束植物繁多,有193科878属1 915种。通过分析科、属、种的分布区类型,结果表明:科的分布区类型以泛热带分布最多(34.2%),其次为世界分布(31.09%)和北温带分布(15.03%),温带分布少于热带分布(41∶90);属的分布区类型以北温带分布最多(17.88%),其次为泛热带分布(14.81%)和东亚分布(12.76%),温带分布多于热带分布(427∶341);种的分布区类型以中国特有分布最多(48.92%),其次为东亚分布(30.73%)和热带亚洲分布(6.73%),温带分布远多于热带分布(705∶245),表明该区植物区系具有明显的亚热带山地植物区系性质。以区系分区区划作为分析地理分布特征的单位,将三清山的中国特有分布型划分为12个亚型,以华东—华中—西南(华南)分布亚型所占比例最大,反映出各区系间联系密切。

The Sanqingshan Mountain locates in the east of Huaiyu Ranges, which is in the northeast of Jiangxi Province. There are various species of vascular plants in Sanqingshan with 1915 species （involving variants, subspecies and forma） belonging to 878 genera of 193 families. Based on the investigation and statistical analyses of distribution types, for families, the pantropical distribution is the most of 34.2%, the cosmopolitan distribution is 31.09% and the north temperate zone is 15.03%. Temperate elements are less than tropical elements with the ratio of 41：90. And for genera, the north temperate zone is 17.88%, the pantropic type is 14.81% and the East Asia type 12.76% at generic level, with the temperate elements are slightly more than the tropical elements （427：341）. At species level, the Endemic to China type reaches 48.92%, the East Asia type30.73%, and the tropical Asia type 6.73%, and the temperate elements are much more than the tropical elements （705：245）. The specific areal types indicate that the floristic characteristic of the reserve is obviously subtropical montane nature. According to the regionalization of Chinese flora, the authors propose that the Endemic to China type can be divided into 12 subtypes, of which the subtype of East-, Central- and Southwest- （South-） China takes the biggest proportion. It reflects the relationships among the floristic elements mentioned above.