佛陀入灭后二世纪于阎浮提兴起的十七个异部之一，属安达迦系，据西藏文献所载，因居于普尔瓦山而得名。

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.