南湖杜鹃（学名：Rhododendron hyperythrum），又名小西氏杜鹃，为杜鹃花科杜鹃属下的一个种。

Rhododendron hyperythrum (微笑杜鹃, wei xiao du juan) is a Rhododendron species endemic to north-central ****** at 900–1200 meters altitude. It grows as a shrub or small tree with leathery leaves, elliptic-lanceolate to oblong-lanceolate, 7–12 × 2–3.5 cm in size, with white flowers.