To which family belongs the Caltha scaposa

Context: Caltha scaposa is a low, perennial herb with one or two yellow hermaphrodite saucer-shaped flowers. This marsh-marigold species belongs to the buttercup family, grows in moist alpine fields and is native to the eastern Himalayas and the mountains on the eastern margin of the Tibetan highland.

Answer: This marsh-marigold species belongs to the buttercup family, grows in moist alpine fields and is native to the eastern Himalayas and the mountains on the eastern margin of the Tibetan highland.