珙桐（学名：Davidia involucrata），又称鸽子树、鸽子花树、水梨子，是一种孑遗植物，野生种只生长在中国中部湖北省和云贵高原北缘秦巴山地等地区。本属植物只有一种两品种，两种相似，只是一品种叶面有毛；另一品种光叶珙桐（Davidia involucrata Baill. var. vilmoriniana (Dode) Wanger.）则叶面无毛。

珙桐是被法国传教士大卫神父作为西方人首次发现并命拉丁种名，大卫神父也是为麋鹿命拉丁种名的人。1904年珙桐被引入欧洲和北美洲，成为有名的观赏树。 根据2009年APG III珙桐科现已被并入山茱萸科

Davidia involucrata, the dove-tree, handkerchief tree, pocket handkerchief tree, or ghost tree, is a medium-sized deciduous tree in the dogwood family Cornaceae, subfamily Nyssoideae. It was previously included with tupelos in a separate family, Nyssaceae. It is native to South Central and Southwest China from Hubei to southern Gansu, south to Guizhou, Sichuan and Yunnan, but is widely cultivated elsewhere.