(Eryngium aquaticum, Linn., in part only, E. aquaticum, β. Linn., belongs to E. Virginianum, Lam.) E. yuccaefolium, Michx., comprises our true species. Natural order , Umbelliferae. Common names , Button Snakeroot, etc. Preparation , Tincture of the root. Authorities. 1 , C. H. McClelland, M.D., took tincture, 5 to 20 drops daily for about ten days (no symptoms appeared until the following week), Am. Hom. Observer, 1865, p. 180; 2 , Dr. C. H. Coggswells took tincture, 10 to 15 drops at a dose, for one week, Am. Hom. Observer, 1866, p. 361; 3 , second proving by the same with the tincture, 150 drops daily for five days, then 1/2 ounce three times in one day, ibid.; 4 , Dr. W. G. Jones took mother tincture, 10 drops first day, 10 drops twice daily second and third days, Hale's New Remedies, p. 336.