Curcuma Caesia, black turmeric or black zedoary, a perennial herb with bluish-black rhiomes.The leaves have a deep violet-red patch which runs through the length of the lamina. Usually, the upper side of the leaf is rough, velvety, but this character may vary. Flowering bracts are green with a ferruginous tinge. Flower petals may be deep pink or red in color. The rhizome is bitter, hot taste with pungent smell. Black Turmeric is used in Tantrik Sadhana. The dried leaves are used as a source for fuel. Northern tribes use Black Turmeric as a talisman to keep the evil spirits away. Presently Black Turmeric is on the verge of extinction.