银杏本身就是奇异古怪的树种,而种子就更有其奇异古怪性。 19世纪末以前,因为银杏的肉质种子很象榧和粗榧的种子,所以把它列入松柏目紫杉科。自1896年日本东京帝国大学小石川植物园的助教平濑作五郎发现了银杏的游动精子以后,才把银杏从紫杉科列出,成为独立的科属。 Ginkgo itself is weird tree species, and the seeds even more strange and eccentric. Before the end of the nineteenth Century, because the succulent seeds of ginkgo seeds and rough like a lot of seeds, so it is included in the taxifoliaceae cypress Division. Since 1896, Tokyo Imperial College Ishikawa Botanic Gardens assistant Hiraise Goro found swimming ginkgo sperm, then the ginkgo listed from the yew family, become an independent genus.