Kaempferia rotunda is a plant species in the ginger family. It is native to China, the Indian subcontinent, Indochina, and widely cultivated elsewhere. It is reportedly naturalized in Java, Malaysia and Costa Rica. Medicinal ( The rhizome juice is used to treat throat problems, but the juice can cause vomiting and much salivation. Always consult your doctor before trying to use a plant medicinally. In India, the rhizome is dried, crushed into a powder and applied as a poultice to patients with mumps.