广东佛冈县观音山植物区系研究

STUDY ON THE FLORA OF GUANYINSHAN IN GUANGDONG

本文分别以科、(?)、种为基本单位详细分析了观音山植物区系成分的组成特点。并通过与其它区系的比较,阐明了它在华南植物区系中的地位,探讨了它可能的起源及归属问题。

This paper reports a detailed analysis of the floristic and phytogeographic composition of Guanyinshan flora, based on survey of existing plant families, genera and species. Its position in the flora of South China, probable origin and categorization are expounded. Guanyinshan is located in Fogang County. Guangdong Province at 23° 57' north latitude and 113°32' east longitude with an area of about 3 000 hectares, the highest peak is 121 8 metres above sea level, and there exist about 1 073 species of wild vascular plants belonging to 168 families and 517 genera.The character - families in Guangyinshan are of the tropical - subtropical elements: Lauraceae. Theaceae. Fagaceae, Aquifoliaceae, Moraceae. Myrsinaceae. Myrtaceae. Symplaoceae etc. The phytogeographic feature is complex. Tropical Asian elements form the dominant component of the plant communities and is the distinctive phytogeographic constituent of the Guanyinshan flora. Most of the specices found in Guanyinshan are distributed over South China or South and Southwestern China, and many of them are also scattered over tropical Asia. Therefore, it is probable that the Guanyinshan flora originated in the tropics, and represents an extension of the tropical flora.Comparison with other floras reveals that the Guanyinshan flora is a subdivision of the mid - South China flora. Its basic characteristics and composition indicate that it more likely originated from the Palaetropic realm rather than the Holartic realm.