The root of In'ula Hele'nium. Off. in U.S.P. 1890 Found in the market in slices cut in various directions. Externally grayish-brown, wrinkled, with overlapping bark. Internally gray. When dry, breaks with a horny fracture. Odor aromatic, suggestive of orris and camphor; taste slightly bitter, warm, aromatic. Gentle stimulant and tonic, supposed also to have diaphoretic, diuretic, expectorant, and emmenagogue properties. Chiefly used in this country for dyspepsia and pulmonary troubles. Dose: ½ to 2 dr. (2 to 8 Gm.), in powder or decoction.