广东荷包岛维管束植物区系特征分析

在对广东荷包岛植被全面踏查的基础上，结合其植物区系成分及组成特征分析，对该区系特点进行了系统研究。结果显示，该岛共有维管束植物135科370属541种，其中，蕨类植物22科28属40种，种子植物113科342属501种；野生种子植物共有465种，栽培植物共有36种。在属级水平上，荷包岛植物区系以热带成分占绝对优势，热带性质属占野生植物非世界广布属的87.80%；在种级水平上，中国特有种74种，占非世界总种数的15.91%。泛热带分布、旧世界热带分布、热带亚洲至热带大洋洲分布、热带亚洲分布4种分布类型构成了该植物区系的主体。将荷包岛与我国东南沿海其他岛屿（澳门、香港东平洲岛、浙江舟山群岛、上海崇明岛）的植物区系进行比较发现，该岛植物区系表现出更强的热带性质，与澳门植物区系性质最为接近。

Analysis of the floristic characteristics of vascular plants on Hebao Island,Guangdong

The flora of Hebao Island in Guangdong province was analyzed systematically by field investigation and the composition and floristic characteristics of the vascular plants were determined. A total of 541 vascular plants belonging to 370 genera and 135 families were recorded, including 465 wild species and 36 cultivated species, among which 40 species belonging to 28 genera and 22 families were pteridophytes and 501 species belonging to 342 genera and 113 families were spermatophytes. At the genera level, the proportion of tropical elements was dominant and reached 87.80%. At the species level, 74 species endemic to China accounted for 15.91% of the non-cosmopolitan species. Four areal types, that is, pan-tropical, old-world tropical, tropical Asian to tropical Australasian Oceania and tropical Asian formed the main flora of Hebao Island. Compared with four other islands (Macao, Tung Ping Chau of Hong Kong, Zhoushan in Zhejiang province, and Chongming of Shanghai) along the southeast coast of China, the flora of Hebao Island showed higher tropical characteristics, and indicated a closer connection to Macao flora.