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作 者 ：方瑞征 白佩瑜 黄广宾 韦毅刚

期 刊 ：云南植物研究 1995年 17卷 S7期 页码：1-3

关键词：植物区系；滇黔桂地区；北部湾地区；区系区划；起源；

Keywords:Flora,

摘 要 ：从植物区系的概念出发，滇黔桂热带亚热带是指泛北极植物区的滇黔桂地区和古热带植物区的北部湾地区。前者约有种子植物248科，1454属，6276种；区系性质是亚热带的，并强烈具有温带区系向热带区系过渡的特点。后者约有种子植物255科，1294属，4303种；具热带北缘的区系性质。依据标志类群或特有类群的分布、植被地带的不同及其他非地带性因素，对研究范围的区系分区确定分为四级：植物区、亚区、地区、亚地区。着重对一级、四级分区进行了讨论。滇黔桂地区再分为黔南桂北亚地区、红水河流域亚地区、滇东南亚地区。北部湾地区再分为桂西南亚地区、桂南亚地区。本文讨论了地区、亚地区3个突出的自然现象：1．喀斯特地貌广泛发育；2．富有热带性的科、属、种，区系成分古老而复杂；3．富特有属、特有种。滇黔桂地区和北部湾地区同属第三纪古热带植物区系向北扩展的衍生部分，区系的核心部分是由华南古陆就地起源的科、属、种形成，区系起源上有着同一性。所不同的是滇黔桂地区受温带区系尤其是东亚区系的影响更深。区系起源的时间最可能在白垩纪或更早。在同一地区范围内，喀斯特植物区系与非喀斯特植物区系有着统一的起源。

Abstract:Based on the floristic concept, the real meaning of tropical and subtropical Dian (Yunnan) -Qian (Guizhou) -Gui (Guangxi) are the Dian-qian-gui region under the Holarctic Kingdom and the Tongking Gulf region under the Paleotropic Kingdom. The former possesses ca. 6276 species in 1454 genera and 248 families, it is subtropic in nature but has strong features of the transition from temperate to tropical flora. The latter has ca. 4303 species in 1294 genera and 248 families and it is northern tropical edge in nature.According to the distributions of characteristic taxa and endemic taxa, the differences of vegetational zones and other azonal factors, these two regions can be classified into four floristical grade: kingdom, subkingdom, region, subregion. Dian-qian-gui region is divided in-to three subregions: South Guizhou-North Guangxi Subregion, Hon-shui river basin subregion. Southeast Yunnan subregion. Tongking Gulf region is divided into two subregions: Southwest Guangxi subregion, South Guangxi subregion. Three significant natural phenomena concerning above mentioned regions and subregions are discussed: 1. The Karst landforms widely develop, 2. they are paleoflora and are very complex in especial rich in tropical families, genera and species, 3. they are especially rich in endemic genera and species.

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