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Echinacea. USD 1926. ECHINACEA. N.F. ECHINACEA Echin. Structure. An outer cork composed of several layers of tabular cells with yellowish, walls and containing oil globules or granular masses; about 8 rows of tangentially elongated rather thick-walled parenchyma cells among which are oil or resin canals; in the rhizome portion are a few strongly lignified bast fibers -with thick walls and simple pores; a thick layer of parenchyma with numerous stone cells and oil or resin canals; characteristic carbon-like masses occur around the stone cells and fibers; sieve tissue in radial rows the latter separated by parenchyma containing inulin and extending to the middle bark; a distinct cambium zone of several rows of thin-walled cells; central portion made up of radially arranged groups of tracheas, separated by broad wedges of parenchyma, the latter with secretion canals and characteristic stone cells. Powdered Echinacea. Grayish; numerous stone cells, strongly lignified, from 0.018 to 0.042 mm in diameter, many being very much elongated and carrying the characteristic carbon-like deposits; numerous tracheae from 0.025 to 0.075 mm in diameter and with simple pores, annular or reticulate markings, occasionally with bordered pores or double spiral markings; fragments of inulin-bearing parenchyma tissue, the latter showing oil or resin canals from 0.080 to 0145 mm in diameter and filled with a reddish brown or yellowish content; fragments of cork and a few fibers. N. F. Heyl and Hart (J. Am. C. 8., 1915, xxxvii, p. 1769) found the drug to contain inulin, 5.9 per cent.; inuloid, 6; sucrose, 7; vulose, 4; betaine, 0.1, and resins, 1.9 per cent.; the latter consisting of two isomeric phytosterols, phytosterolin, and the following fatty acids, oleio, linolic, cerotic and palmitic, but could find no physiologically active substance. Brauneria purpurea, DC., Britton (Rudbeckia purpurea L., Echinacea purpurea Moench), Black Sampson, Purple Cone-flower (Virginia to Illinois and southward to Louisiana), is similarly used. Uses. Echinacea has been attributed with the property of increasing the resistance of the body to infection and is consequently used in boils, septicemia, and other infective conditions. Couch and Giltner (J. Agricult. Research, 1920, xx, 63) in a study on guinea-pigs failed to obtain any evidence of a beneficial effect in a variety of experimental infections. It is also attributed with aphrodisiac arid analgesic powers, but is probably without therapeutic value. Hale (Lancet Clinic, March, 1901) injects an extract into the rectum in the treatment of hemorrhoids. Dose, of the fluidextract, fifteen to thirty minims (1-2 cc.). Off. Prep. Fluidextractum Echinaceae, N. F.
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