连香树(Cercidiphyllum japonicum)又名紫荆叶木,系连香树科落叶大乔木,为东亚著名的孑遗植物,1属,1种1变种,产于我国和日本。在上白垩纪和第三纪曾广泛分布于北半球,在第四纪冰期后分布区急剧缩小,现仅存我国浙、皖、鄂、川、陕、甘、晋等地。此种 Cercidiphyllum japonicum, also known as Bauhinia leaf wood, even the deciduous trees of the family, is the famous relict plant in East Asia, 1 genus, 1 species 1 variety, produced in China and Japan. In the Upper Cretaceous and Tertiary were widely distributed in the northern hemisphere, after the Quaternary glacial period, the distribution of the area has shrunk dramatically, now only in China Zhejiang, Anhui, Hubei, Sichuan, Shaanxi, Gansu, Shanxi and other places. This kind