广东车八岭国家级自然保护区种子植物区系研究

车八岭国家级自然保护区种子植物区系种类丰富,含１６１科６４５属１３４５种（包括种下等级）,并有相当数量的古老种类和１４种珍稀濒危重点保护植物。壳斗科Ｆａｇａｃｅａｅ、樟科Ｌａｕｒａｃｅａｅ、茶科Ｔｈｅａｃｅａｅ、木兰科Ｍａｇｎｏｌｉａｃｅａｅ以及杜英科Ｅｌａｅｏｃａｒｐａｃｅａｅ、安息香科Ｓｔｙｒａｃａｃｅａｅ、全缕梅科Ｈａｍａｍｅｌｉｄａｃｅａｅ等是该区系的主要表征科,构成了其各森林类型的主要树种组成。种子植物区系成分较为复杂,主要表现在科地理成分的广泛性和属地理成分的多样性,而以热带—亚热带成分占明显的优势,热带及温带区系成分均有相当的影响,各类成分交错渗透,叠置分布。本文对车八岭国家级自然保护区植物区系的归属,广东与云南植物区系的关系等争议问题展开了讨论,认为车八岭自然保护区植物区系是中亚热带向南亚热带过渡的区系类型,为华南植物亚区的组成部分,隶属于古热带植物区。广东与云南植物区系关系密切,极可能具有同一起源（华夏植物区系）,宜划入同一植物亚区。

A STUDY ON THE SPERMATOPHYTA IN THE NATIONAL CHEBALING NATURE RESERVE OF GUANGDONG

This paper is a preliminary opinion on the flora of the Spermatophyta in the National Chebaling Nature Reserve (CBLNR).CBLNR is located at the southeastern part of Shixing County, 29°41'N and 114°10'E, northern Guangdong Province, with an area of 7545 ha. Tianpingjia, the highest peak, is of an elevation of 1256 m. The range of the reserve is a transitional region of South China mid-subtropics towards Lower-subtropics.In CBLNR, according to our collection and determination, there are 161 families,645 genera, and 1345 species (including intraspecific taxa, similarity hereinafter) of the Spermatophyta, including 8 families, 10 genera, and 14 species of the Gymnospermae, and 153 families, 635 genera, 1331 species of the Angiospermae─the Dicotyledonae 128 families, 491 genera, 1067 species, and the Monocotyledonae 25 families, 144genera, 264 species. Among them, 14 are precious, rare and endangered species and protected by national or provincial degrees.There are eleven different distribution types in CBLNR, the dominant ones are those of subtropical. The dominants of the forest community are mainly of the following families: Fagaceae, Lauraceae, Theaceae, Magnoliaceae, Elaeocarpaceae, Styracaceae and Hamamelidaceae. Infiuences of the tropical flora and of the temperate flora are quite strong upon the CBLNR flora, and the former is some stronger.On comparing the composition of its flora with some neibouring floras, CBLNR is most similar to Dinghu Mountain, one of the representative floras of the "Southern Subtropical Region". The tropical elements in CBLNR flora are obviously less thanthose in the Hainan flora, and the temperate ones less than those in the Shenongjia flora, which is on the verge of the "Northern Subtropical Region".So, the authers think the CBLNR flora Should be a part of the "Austro-Cathaysia Subkingdom", suggested by Professor Chang Hongda, belonging to the "Paleotropic Kingdom".