Abstract: Yunnan is a province rich in flora. There are about 13,000 species of 1,984 genera alnong 240 families (230 families of Angiospermae according to Hutchin- sonts system and 10 families of Gymnospermae) in Yunnan. The number of family in Yunnan is about 79.73% of 301 families in China, the number of genera 64.8896 of 3,058 genera in China, and the number of species 52% of 25,000 species in China. The four very big families such as Orchidaceae, Compositae, Papilionaceae and Gramineae which contains 10,000 or more species in world- wide separately, all have a lot of species in Yunnan.

Key words: Floristic, Palaeonmic, Neoendemic

摘要： 云南具有丰富的植物区系，现知种子植物240科（裸子植物10科，被子植物230科），1，984属，约13，000种。无论从那一派分类学家的系统或观点来说，云南都有众多的古老或原始的科属。从云南种子植物属15个分布区类型比较分析，云南区系明显是热带性质并且具有丰富的温带成分，热带的属占云南总属数（不包括世界分布属,下同）61.89％，温带的属却占32.19％。中国特有属在云南分布约有83属，占云南总属数4.39％，并占中国特有属224个的37.05％。

关键词: 植物区系, 分布区类型, 热带, 温带, 云南