大白杜鹃（学名：Rhododendron decorum sp. decorum）为杜鹃花科杜鹃属下的一个亚种。

Rhododendron decorum (大白杜鹃) is a rhododendron species native to Myanmar and Guizhou, Sichuan, ******, and Yunnan, China, where it grows at altitudes of 1000–3300 meters. It is a shrub or small tree that grows to 1–6 m in height, with leathery leaves that are oblong, oblong-ovate or oblong-elliptic, 5–19 by 3–11 cm in size. Flowers are white to pale pink.