Structural Study of Secondary Xylem in Bretschneidera sinensis Hemsl. Studies on the Chemical Constituents of Bretschneidera sinensis Hemsl. EndEmic in China Studies on the community feature comparison and phylogeography of relic plant Bretschneidera sinensis in Nankun and Daling Mountain, Guangdong Province ISSR Analysis on the Genetic Diversity of Relic Plant Bretschneidera sinensis from Wuyishan Region Genetic Diversity of Natural and Planted Populations of Bretschneidera sinensis from Nanling Region Ecological Anatomy of the Root in Bretschneidera sinensis,a Threatened Endemic Plant in China Ecological Anatomy of the Root in Bretschneidera sinensis,a Threatened Endemic Plant in China Features of Leaf Appendages of Bretschneidera sinensis in Different Development Stages Death causes and conservation strategies of the annual regenerated seedlings of rare plant, Bretschneidera sinensis