优秀的树种———银杏郑州大学秦桂香银杏是种子植物中最古老的树种之一，为历史遗物，被称为“活化石”，仅存于我国。银杏叶似鸭掌，故原名“鸭掌树”，其核为鸭果子。宋朝选为贡品，改称为银杏。因其生长发育较缓慢，进入结果期晚，古代认为是３０年而生，３０年而兴，... Excellent tree species --- Ginkgo Zhengzhou University Qin Guixiang Ginkgo biloba is one of the oldest species of seed plants, as a historical relic, known as “living fossils”, only in our country. Ginkgo biloba is like a duck’s palm, so its name was “duck’s palm tree” and its core is duck’s fruit. Song Dynasty selected as a tribute, renamed Ginkgo. Because of its slower growth and development, into the late results, the ancient think is 30 years old, 30 years and Xing, ...