映山红（学名：Rhododendron simsii）是杜鹃花属植物，又名杜鹃花、山踯躅、山石榴、照山红（河南）、唐杜鹃（《**植物志》）。

常绿、半常绿或落叶灌木植物，多分枝；卵状椭圆形叶子互生，上面有疏糙伏毛，下面的毛较密；盛开于春天，他们花常持续数周。耐荫，他们更喜欢在树附近，或在树下生长。开红色、粉色或白色等颜色阔漏斗形花，2－4朵簇生枝端；卵圆形蒴果，密被糙毛。

Rhododendron simsii (杜鵑) is a rhododendron species native to East Asia, where it grows at altitudes of 500–2700 meters. It is a shrub that grows to 2 m in height, with leaves that are ovate, elliptic-ovate or obovate to oblanceolate, 1.5–5 by 0.5–3 cm in size. Flowers range from white to dark red.