Rhododendron degronianum is a species native to northern to Japan, where it grows at altitudes of about 1800 meters. It is a shrub that grows to 2.5 m in height, with leaves that are narrowly to broadly elliptic, or linear lanceolate. Flowers are pink fading to white.
pontic rhododendron, is a species of rhodoendron native to southern Europe and southwest Asia. Though it had been present in Great Britain before the last Ice Age, it did not recolonise afterwards and the ecology of the island grew up without it. Its presence today is due to humans introducing it, and it easily naturalises and becomes a pest in some situations, often covering whole hillsides (especially in Snowdonia and the western British Isles). In the British Isles, it colonises moorlands, uplands, shady woodlands (alongside escaped laurels and the native holly) and in areas of acid soils, often in shaded areas. Often used for game cover by the landowners of old it has become very invasive in some areas.