湖南石灰岩特有植物的初步研究

Primary Study of Limestone Endemic Plants in Hunan Province

经野外调查采集，查阅标本，初步整理了湖南石灰岩植物名录，计１１３科、２５５属、４２４种．通过比较、分析，湖南境内仅分布于石灰岩生境的植物种类有６８种，主要分布在湘南的石灰岩丘陵区．区系地理分析表明，湘南石灰岩植物可视为滇黔桂或华南至西南石灰岩植物的一部分．针对目前国内多数学者对石灰岩特有植物多以某一地域范围来确定而又出入较大的情况，指出：“石灰岩特有植物”一词用于某一地域较合适，而对石灰岩生境高度适应的种类，即完全分布于石灰岩，不见于酸性土的种类，采用“石灰岩专有种”一词是可行的，并提出了一些石灰岩专有植物．

The primary list of limestone plants in Hunan includes 424 species belonging to 255 genera and 113 families. It is mainly based on field exploration and a study of the specimens in herbarium. A comparison and an intensive analysis show that only 68 species are found over limestone in Hunan. A flora and geographical study shows that the limestone plants in South Hunan can be considered as a part of Dian(Yunan)Qian(Guizhou)Gui(Guangxi) or South China to Southwest China limestone plants. Because of the divergences on the implemented scope of limestone endemic plants, the authors think that it is suitable to use the term in some areas, while it is more suitable to use the term limestone exclusive plants in pure limestone region without acid substance. Finally, some limestone exclusive plants have been categorized.