美蕊花、贝壳杉及红花天料木等树种的分布区域窄小，WI值的分布幅仅7～10℃·月；
While the distribution area of Calliandra surinamensis , Agathis dammara and Homalium hainanense is narrow and small , whose distribution breadth of WI value is only 7 ~ 10 ℃ / month ;
红花天料木