二乔木兰（学名：Magnolia × soulangeana）是木兰科木兰属的植物，分布于中国大陆的广州、杭州、昆明等地，是由玉兰（Magnolia denudata）和紫玉兰（Magnolia liliiflora）自然杂交得到，花朵颜色介于两亲本之间，花被片外面上端为白色，基部呈紫色，花内面白色。3种玉兰的组织培养实验表明二乔木兰是再生能力最强的，由此可以看出二乔木兰是易于栽培的经济观赏花木。花期为2~3月，果期为9~10月。

Magnolia × soulangeana (saucer magnolia) is a hybrid plant in the genus Magnolia and family Magnoliaceae. It is a deciduous tree with large, early-blooming flowers in various shades of white, pink, and purple. It is one of the most commonly used magnolias in horticulture, being widely planted in the British Isles, especially in the south of England; and in the United States, especially the east and west coasts.