苗儿山植物区系的初步研究

<正> 苗儿山自然保护区是我国亚热带天然林保存较好、并有一定代表性的林区之一。它的植物区系成分复杂,植物种类繁多,古老孑遗植物丰富。研究其植物区系的组成和特点,对进一步研究广西乃至我国的植物区系,及开发利用保护区内的植物资源,使之更好为我国社会主义建设服务,均有一定的意义。

A PRELIMINARY STUDY ON THE MIAOERSHAN FLORA

Miaoershan is situated at the northeast of Guaogxi, and thisarticle deals with its flora.1.Antiquity in the geological history, topographic complexity and variety, temperate climate, richness in the resources of water and fertile soil are generative and developmental basis of Mtaoershan flora.2.The Miaoershan flora belongs to the middle subtropic flora. The principal representative families are: Theaceae, Lauraceae, Fagaceae, Arali-ceae and Symplocaceae, etc.3.The tropical species and subtropical species of warmer climate mainly occured at the lower and the southern part of Miaoershan; while the tempe-rate species and subtropical hardy species mainly at the top and northern part of the mountain.4.The fundamental features of Miaoershan flora may be summarized as:1) The geogra-phical elements are complex. Floristic composition of families containing more than 6 species each may be as follow:cosmopolitan 939.1%, tropical 10.9%, tropical-subtropical 29.7%, tropical -temperate 7.8%, tempera-te 12,5%. The geographical distribution of genera can be divided into 11 types, those of East Asia (East Himalayan-Japan) is the main, about 22.6%.2) The origin of Miaoershan flora is very ancient. 16 families, 45 genera and 118 species of spermatophytes and ferns are genetically ancient or primitive.3) plant spcies are very rich. There are 188 families, 626 genera and 1436 species of vascular plants, numerically surpassed only by Dayaoshan flora in Guangxi. 4) Endemic species are rich. There are 11 species endemic to Mioershan and also 16 new species and new varieties. 5) Woody plants predominate. 6) Buttressed trees do not exist.5, Miaoershan flora especially closely related to Huaping flora in Guangxi. They are relaled to each other mainly through subtropical elements.6. Miaoershan flora should be protected and may be used for tourism, production. scientific studies and education as well. Miaoershan Natural protected Area may become a protected area of integration.