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中文摘要：
通过对云南德钦天然侧柏群落的结构与植物区系特点进行了调查研究，结果表明，组成该群落的种子植物种类计86种，隶属于38科、63属。其群落结构与植物区系特点为：（1）群落结构极为简单，不仅林木稀疏，灌木和草本植物种类也很少。（2）区系分析显示，热带性质的科有9科，温带性质的科有8科，表现出热带性质的科与温带性质的科在该区域相互交融分布的状况；在属级组成中，温带性质的属有39属，占73．58％，表现出极强的温带性质；种级组成中，以中国特有分布种为主，占70．94％，其中又以西南分布为中心，且有中国特有分布的虎榛子属（Ostryoopsis）及金铁锁属（Psammosilene）。
英文摘要：
The structure and flora of natural Platycladus orientalis community in Deqin of Yunnan province were studied. The results showed that there were 86 species of seed plants in natural Platycladus orientalis community, belonging to 38 families and 63 genera. The community structure was simple, the number of trees was small, and the species of shrub and herbal plants were few. The results of flora analysis indicated that, 9 families showed the characteristics of tropical, and 8 familics werc obviously the tcmperate flora. At the level of genus, 39 gencra helonged to the temperatc, which was 73.58 % of the total. Many species were Chinese endemic species, and southwest China was the distribution center. Two Chinese endemic genera in natural Platycladus orientalis community in Deqin were Ostryopsis and Psammosilene.
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