Vireyas are a group of approx. species of rhododendrons which grow predominantly in tropical mountainous areas ranging from 1200 to 2400 metres. They can be found mostly in Malaysia, Indonesia, Phillipines, Papua New Guinea and North Queensland with some also in NE India and Vietnam. Most vireyas are epiphytic in cool montane forests but higher altitude species grow in the ground. Many species and hybrids flower more than once during the year.