Rhododendron subg. Vireya is a tropical subgenus of Rhododendron with 310 known species. Vireyas are native to southeastern Asia and range from Thailand to Australia. Rhododendron subgenus Vireya – more commonly known as Vireya Rhododendrons, or simply Vireyas.
Although these are tropical regions, vireyas mostly grow in the cool mountainous areas, either as epiphytes high in the tall trees of the cloud forest, or in more open ground in shrubberies.