Eryn'gium aquat'icum (yuccaefo'lium), Button Snakeroot. -- The root, U.S.P. 1820-1860; United States. Plant .6-1.8 M. (2-6 degrees) high, leaves rigid, pointed, .3-1 M. (1-3 degrees) long, bristly; flowers white; root tuberous, 6-12 Mm. (1/4-1/2') long, branched, cupshaped scars, central pith, aromatic; taste sweet, acrid aromatic, resembles parsnip; contains volatile oil. Diaphoretic, expectorant, sialagogue, emetic; dropsy, gravel, jaundice, substitute for senega; infusion, decoction, tincture. Dose, 3ss-1 (2-4 Gm.).