Dolomiaea costus

Dolomiaea costus, formerly known as Saussurea costus, commonly known as costus, Indian costus, kuth, or putchuk, is a species of thistle in the genus Dolomiaea native to South Asia and China. Rishi (Hindu) mystics of Kashmir especially ate this plant. Essential oils extracted from the root have been used in traditional medicine and in perfumes since ancient times.

Costus is the root of this plant. The root of the plant is the key part used for medicinal or homeopathic purposes. The root is also called by its Latin name radix aucklandiae (root of aucklandia).

It has a large number of names in other languages, including kuṣṭha in Sanskrit; kust or qust in Arabic and Persian; kut, kur, and pachak in Hindi and Bengali, kostum, gostham, and potchuk in Tamil; upaleta and kur in Gujarati; kot or kust in Punjabi; changala in Telugu; sepuddy in Malayalam; kostha in Kannada; kuth or postkhai in Kashmiri; and kosht (קשט) in Hebrew; koto in Swahili; mu xiang in Chinese.