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珙桐(Davidia involucrata Baill),又名水梨子、水冬瓜,为世界驰名的稀有观尝树种。因开花时状如一群白鸽栖于树上,国外有“中国鸽子树”之称。1964年日内瓦会议期间,周恩来总理在瑞士见到此树,当得知原产我国后,曾嘱大量种植。珙桐天然分布于我国湖北西北部、四川西南部及贵州海拔1200～1800米的阔叶林中。陕西巴山东部的镇坪、白河等地也有零星分布。由于母树稀少,采种不易,繁殖困难,近年来此树日趋减少。1980年,我们从湖北恩施取来种子,进行播种育苗,已获得成功。
Davidia involucrata Baill, also known as water pear, water melon, the world famous rare ornamental tree species. Flowering like a group of white pigeons habitat in the tree, foreign “Chinese pigeon tree,” said. During the 1964 Geneva Conference, Premier Chou En-lai met the tree in Switzerland. When he learned that the country of origin was China, he had urged a large number of cultivation. Davidia natural distribution in China’s northwestern Hubei, southwestern Sichuan and Guizhou elevation of 1200 ~ 1800 meters in the broad-leaved forest. There are sporadic distributions in Zhenping and Shirakawa in the eastern part of Bashan, Shaanxi Province. As a result of sparsely populated mother trees, it is not easy to seed and reproduce, and the number of trees is decreasing in recent years. In 1980, we took the seeds from Enshi, Hubei Province for sowing seedlings and have succeeded.