Rhododendron vialii (红马银花) is a rhododendron species native to Laos, Vietnam, and southern Yunnan, China, where it grows at altitudes of 1200–1800 meters. It is a shrub that grows to 2–4.5 m in height, with leaves that are lanceolate, oblong-lanceolate or obovate-lanceolate, 4–9 by 1.8–4 cm in size. Flowers are dark red.