Perennial plant from warm climates. Looses its leaves in autumn and enters into vegetative rest. Sprouts in spring from a leaf bud at the end of the neck. The root, which is harvested after several years, has many medicinal properties: it stimulates and relaxes the nervous system, it improves memory, stabilizes blood pressure, purifies the liver, reduces cholesterol and is anti-carcinogenic. CULTIVATION: light and shady ground. Resists frost down to -15ºC in resting state.