Rhododendron yedoense

Rhododendron yedoense (syn. Rhododendron poukhanense), the Korean azalea, is a species of flowering plant in the family Ericaceae, with a disjunct distribution in northern Myanmar, Yunnan province in China, South Korea, and northern Kyushu island of Japan. Hardy in USDA zones 4 through 9, it is recommended as a hedge, and has above average resistance to the root rot that often afflicts azaleas. Rhododendron yedoense f. poukhanense is a major parental contributor to many modern hybrid azaleas.

Subtaxa
The following forms are accepted:
 * Rhododendron yedoense f. poukhanense (H.Lév.) Sugim. ex T.Yamaz. – South Korea, northern Kyushu
 * Rhododendron yedoense f. yedoense – northern Myanmar, Yunnan