Botanical Description.— A. tall, slender, erect plant, one to two feet high, with a large, perennial, branching, yellowish root, whicli sends up several et&ma from two to five feet in heiglit, round, and generally simple and smooth. Thefliyaert are disposed upon a large terminal umbel. The root, when full grown, is sometimes an inch in thickness and two feet In length. It is without unpleasant taste, producing odIj a sense of heat a short time after It has been taken. The medicinal virtues are said to reside in the cortical portion, which is thick, and constitutes two-thirds of the whole root. They are taken out by water and alcohol, and rem^iin in the extract formed by the evaporation of the decoction of the tinctura. This species is one of ofer tliirty of the genus Euphorbiacefe, indigenous to this country, to which belongs the European species E, offlctnalis, proved and used by Hahnemann. The E. coroUata is found all over the United States, growing chiefly in a dry, barren, aud sandy soil, seldom growing in woods or on the borders of streams. Its flowers appear in July and August, The central head is two or three weeks earliest. Officinal Pheparations. — Tincture of the root; dilutions. AHAnx>GUE8.— (7™(Dm tiglium, EuphoTbiii, qffieinalit, Mlal^iiim, JaUqtpa, Lobelia, Eelieboiiu niger, Veratrum al&um. dbyGoogle ErPHOKBlA SYPERIOIFOLIA.