Rhododendron molle
Rhododendron molle is a rhododendron species native to China and Japan, where it grows at altitudes of sea level to 2500 meters. This deciduous shrub grows to in height, with leaves that are oblong to oblong-lanceolate, 5–11 by 1.5–3.5 cm in size. The flowers are yellow with dark red flecks.
This azalea is not often seen in cultivation, but is the parent of many yellow-flowered hybrids.