云南省小黑山自然保护区种子植物区系研究

小黑山自然保护区有野生种子植物170科787属2195种。分析表明该区种子植物区系的地理成分复杂,联系广泛。热带性质的属有506属,占总属数的68.6%,温带性质的属有224属,占总属数的30.4%。热带性质的种890种,占总种数的40.9%,温带性质的种有1267种,占总种数的58.3%。表明该地区植物区系具有明显的亚热带性质,同时深受热带植物区系的影响。植物区系来源主要由东亚成分、热带亚洲成分(印度—马来西亚成分)、中国特有成分三部分融合而成。特有现象明显,有东亚特有科5科,中国特有属6属,中国特有种778种,占种总数的35.8%,而云南特有种有355种,占中国特有种的45.6%。保护区还拥有众多的珍稀濒危植物。

Study on floristic phytogeography of seed plants in Xiaoheishan Reserve,Yunnan Province

The flora of Xiaoheishan Natural Reserve consist of 2 195 species of seed plants belonging to 170 families,787 genera. Based on the analysis of the floristic elements at family,genera and species level,there are some conclusions as follows:The floristic elements of the Xiaoheishan Reserve are complex. Almost all kinds of distribution types are more or less represented here. Among the genera distribution patterns,the floristic elements with 68.6% tropical genera and 30.4% temperate ones reveal dominant tropical property. And in the species distribution patterns,the floristic elements with 40.9% tropical species and 58.3% temperate ones indicate that the flora is south subtropical in nature. The seed plants flora of Xiaoheishan Reserve have three main origins. One is tropical Asia(or Indo-Malesia),the second one is East Asia,the last one is endemic of China which come from Indo-Malesia and East Asia in special environment. The endemism is rich,5 families endemic to Eastern Asia ,6 genera and 778 species to China. The reserve also has many rare or endangered species.