佛陀入滅後二世紀於閻浮提興起的十七個異部之一，屬安達迦系，據西藏文獻所載，因居於普爾瓦山而得名。

One of the seventeen heterodox sects that arose in Jambudīpa in the second century after the Buddha’s death, allied with the Andhaka school and, according to Tibetan sources, named for dwelling on the Pūrva Mountain.