Abstract: There were 245 species belonging to 199 genera in 99 families from the limestone area of Yinde. The numeral dominant families were Euphorbiaceae, Papilionaceae, Orchidaceae, Pteridaceae, etc. The geographical elements of family and genus were tropical and sub-tropical. There were 7 endemic genera to China, such as Eurycorymbus and Pteroceltis, 15 endemic species to limestone area, such as Sapium rotundifolium and Zenia insignis, 15 species belonging to 5 families and 13 genera of rare and endangered species, such as Eurycorymbus cavaleriei. The dominant species of vegetation were Dimocarpus longan, Sterculia lanceolata, Adenanthera pavonina var. microsperma, and Cinnamomum burmanni, etc. Based on the special habitat of limestone, the protection on plant diversity should be strengthened.

Key words: limestone, endemic species, vascular plant, flora, vegetation

摘要： 据调查，英德石灰岩地区有维管植物99科199属245种，数量优势科为大戟科、蝶形花科、兰科和凤尾蕨科等；科、属的地理分布均以热带亚热带成分为主；有伞花木属Eurycorymbus、青檀属Pteroceltis等7个中国特有属；有圆叶乌桕Sapium rotundifolium、任豆Zenia insignis等15个石灰岩特有种；有伞花木Eurycorymbus cavaleriei等珍稀濒危植物5科13属15种；植被优势种为龙眼Dimocarpus longan、假苹婆Sterculia lanceolata、海红豆Adenanthera pavonina var. microsperma、阴香Cinnamomum burmanni等。基于石灰岩生境的特殊性，建议加强对其植物多样性保护。

关键词: 石灰岩, 特有种, 维管植物, 区系, 植被