Rhododendron schlippenbachii, the royal azalea, is a species of Rhododendron native to the Korean Peninsula and adjacent regions of Manchuria (Liaoning, Nei Mongol), Japan, and the Russian Far East. It is the dominant understory shrub in many Korean hillside forests, growing at 400–1,500 m (1,300–4,900 ft) altitude.
It is a dense deciduous shrub growing to 4.5 m (15 ft) in height, but more commonly 1–2 m (3.3–6.6 ft) tall. The leaves are obovate, 4.5 cm (1.8 in) long and 2.5–4.5 cm (0.98–1.77 in) ...