Cassumunar ginger: Zingiber cassumunar, now thought to be a synonym of Zingiber montanum (J.König) Link ex A.Dietr., is a species of plant in the ginger family and is also a relative of galangal. It is called plai (ไพล) in Thailand, in addition to (ว่านไฟ wan-fai) in Isan language and (ปูเลย bpulai) in northern Thai language. The rhizome of variant 'Roxburgh' is used medicinally in massage and even in food in Thailand, and somewhat resembles ginger root or galangal. In aromatherapy, plai oil is used as an essential oil and is believed to ease pain and inflammation. It is also known as ponlei (ពន្លៃ) in Cambodia.