Rhododendron thayerianum (反边杜鹃) is a rhododendron species native to western Sichuan in China, where it grows at altitudes of 2600–3000 meters. It is a shrub that grows to 3–4 meters in height, with leathery leaves that are narrowly oblanceolate, and 9–17 × 1.5–2.5 cm in size. Flowers are white, sometimes deeply flushed pink on the outside along the petal ridges, or pink.