摘要
大明山位于北回归线上,北纬23°24′～23°30′,东经108°22′～108°24′。蕨类植物非常丰富,现已发现49科、114属、290种。区系地理成分复杂多样,属可划分为12类型(变型),种可划分为13种类型(变型),科内、属内种类贫乏。本区系具亚热带性质,带有明显的热带性,热带分布属占70%,热带分布种占47.82%,亚热带分布属占12.28%。特有现象明显,有中国特有种47个,其中大明山特有种9个。本区系与热带植物区系特别是印度支那蕨类区系有密切的联系,属的相似率高达97%,种的相似率为65.39%。
Mt.Damingshan locates just at the Tropic of Cancer,between 23°24′-23° 30′N,and between 108°22′-10°24′E.Pteridophyte flora in Mt. Damingshan is rather rich,there are 290 species represented 114 genera and 49families there.The types of pteridophytic area pattern t that place are rich also,the genera and species area pattern have 12 types and 13 types respectively.It's a notable phenomenon that the species are rare in pteridophyte genera and families in Mt.Damingshan.This flora is subtropical characteristics,of which according to genera area pattern,the tropical elements are 70%,the subtropical elements are 12.28%,while according to species area pattern,the tropical elements are 47.82%. The rather obvious endemic phenomena is another characteristic of this pteridophte flora,47 chinese endemic species including 9 endemic species of Mt.Damingshan have been found.This flora is most similar to that of tropical area,especially Indo-China.The genera and species affinity rate between the flora and that of Indo-China are 97% and 65.39% respectively.
关键词
蕨类
植物区系
大明山
广西
pteridophyte flora
Mt.Damingsban
Guangxi
