A giant plant with velvety pointed leaves and large yellow flowers. Traditionally used as a respiratory herb, the root is dug after a year or 2 in the fall. The root preparations have been used to quiet irritable bronchial coughs and also helpful for asthma, and tuberculosis. It has an overall anti-bacterial effect and will also stimulate digestion and tone the stomach. Very drought tolerant and satisfying to grow. Great at the back of a border. Prefers Full sun. Perennial Hardy to zone 3.