Abstract: The diversity of vascular plants in Baichong Provincial Nature Reserve in Yangchun City of Guangdong Province was investigated by step up surveys, sampling route inventory and quadrat methods surveys, and the plant community composition as well as floristic characteristics were analyzed. The results showed that there were 1320 species of vascular plants, belonging to 652 genera in 172 families. The number of species was more abundant than that of similar provincial reserves. The composition of plant families was dominated by medium and oligo species families, accounting for 61.63% in total. The composition of genera was dominated by the distribution of oligo-species (2 to 5 species) and single species genera, accounting for 91.48% in total wild vascular plants. The flora of vascular plants in this reserve was complex, with a predominantly tropical composition (80.83%), including 13 area-types and 14 variety-types, among which the pantropical distribution pattern had the greatest varieties of genus. And temperate composition accounting for 17.79% (removed cosmopolitan type). Baichong Nature Reserve has abundant heat, rich vascular plant species, and typical characteristics of south subtropical flora.

Key words: Baichong Provincial Nature Reserve, vascular plants, species diversity, flora analysis

摘要： 采取踏查、样线和样方调查法对广东阳春百涌省级自然保护区维管植物多样性进行调查，并分析其植物种类组成与区系特征。结果表明，保护区共有维管植物172科652属1320种，与邻近同等级的保护区相比，物种数量较丰富；野生植物的科组成以中等科和寡种科占优势，两者共占61.63%，属组成以寡种属(2～5种)和单种属占绝对优势，共占野生植物总属数的91.48%；属的分布区类型包括13个分布型和14个变型，以热带分布型属为主(80.83%)，其中泛热带分布型属占比最高，热带亚洲(印度-马来西亚)成分也较丰富。温带成分占总属数的17.79%(不计世界分布)。百涌自然保护区热量充沛，维管植物种类丰富，具有典型的南亚热带植物区系特点。

关键词: 百涌省级自然保护区, 维管植物, 植物物种多样性, 植物区系