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国家二级保护植物翠柏（Ｃａｌｏｃｅｄｒｕｓ ｍａｃｒｏｌｅｐｉｓ Ｋｕｒｚ）和黄杉（Ｐｓｅｕｄｏｔｓｕｇａ ｓｉｎｅｎｓｉｓ Ｄｏｄｅ），仅在云南易门有较大面积的纯林分布，是很有保护价值的２个树种和相应的２个森林群落，现已成为全国唯一的翠柏和黄杉自然保护区。本文从群落特征、区系和种群分布格局的角度，首次较全面地分析了翠柏和黄杉极需保护的重要性。结果表明翠柏幼苗的耐阴性及黄杉幼苗的喜光性都是其分布范围受限制的主要原因之一；根据化石资料得出翠柏可能起源于滇中南；从分析群落中种子植物属的分布区类型得出翠柏的分布地生境比黄杉更趋于热带性。这些研究为翠柏及黄杉的就地保护和迁地保护提供理论依据。
National secondary protected plant Calocedrus macrolepis Kurz and Pseudotsuga sinensis Dode, with only a large area of pure forest in Yunnan Yimen, are two protected species and two corresponding forests Community, now the country has become the only cypresses and yellow fir nature reserve. In this paper, for the first time, from the perspectives of community characteristics, fauna and population distribution, the importance of extreme need protection for cypresses and juniper trees was analyzed for the first time. The results showed that the tolerance of Cucumis sativus seedlings and the hi-light of Sequoia saplings were one of the main reasons for their limited distribution range. Based on the fossil data, it was concluded that the Cucumbers could originate from central Yunnan. The results showed that the geographical distribution of the cypresses is more tropical than the Douglas fir. These studies provide a theoretical basis for the in-situ conservation and ex-situ conservation of Cucumbers and Douglas fir.