PYRETHRUM

(Lat), n. n. Piar(pu6r)'e'ith-ru3m(ru4m). Gr., irupedpov (from irvp, fire). Fr., pyrethre (salivaire [4th def.]), pyrethre officinal (racine) [Fr. Cod.] (4th def.). Ger., Bertramwurz (3d def.), (romische) Bertramwurzel (4th def.). Sp., pelitre (raiz) [Sp. Ph.]. 1. The Chrysanthemum parthenium. 2. Of Medicus, the genus Spilanthes. 3. Of Bentham and Hooker, a section of the genus Chrysanthemum. 4. The root of An a cyclus p. [U. S. Ph., Br. Ph., Fr. Cod., Austr. Ph., Belg. Ph., Gr. Ph., Sp. Ph., Swi Ph.], or of An a cyclus of ficin arum [Ger. Ph., Dan. Ph., Hung. Ph., Ru . Ph., Swed. Ph.]. [B, 42, 95, 121 (a, 35. 38).] E entia pyrethri. See Tinctura pyrethri. Pyrethri radix. See P. (4th def.). P. camphor. A constituent, C^H^O, of oil of Chrysanthemum parthenium, differing from laurel camphor only in turning the plane of polarized light to the left. [B, 270 (a, 38).]- P. carneum. See CHRYSANTHEMUM roseum. P. commune. See AN A CYCLUS of ficin arum. P. german i cum. See AN A CYCLUS of ficin arum and ACHILLEA ptarmic a. P. of ficin arum. See AN A CYCLUS of ficin arum. P. parthenium. See CHRYSANTHEMUM parthenium. P. roiiiii iiinii. See AN A CYCLUS p. P. roseum. See CHRYSANTHEMUM roseum. P. silvestre. See ACHILLEA ptarmic a. Radix pyrethri. See P. (4th def.). Tinctura pyrethri [U. S. Ph., Br. Ph., Belg. Ph., Dan. Ph., Ru . Ph.]. Fr., teinture [Fr. Cod.] (ou alcool at) de pyrethre. Sp., tintura alcoholic a de pelitre [Sp. Ph.]. A tincture made by macerating 1 part of the root of An a cyclus p. in No. 40 powder with alcohol for 1 day and treating in a percolator with alcohol enough to obtain 5 parts of filtered tincture [U. S. Ph.]; by macerating 1 part of the coarsely powdered root with 5 parts.of 80-per-cent. alcohol for 10 days [Fr. Cod., Sp. Ph.] (for 6 days [Belg. Ph.]); by macerating 4 fl. oz. of the root in No. 40 powder for 2 days with alcohol, and treating in a percolator with alcohol enough 'to obtain 20 fl. oz. of filtered tincture [Br. Ph.]: or by macerating 1 part of the root of An a cyclus of ficin arum for 5 days with 5 parts of spirit of rosemary [Ru . Ph.] (digesting it 3 days with 5 parts of dilute alcohol [Dan. Ph.]). [B, 95, 119 (a, 38).] Tinctura pyrethri compos i fra. Sp., tintura alcoholic a de pelitre compuesta [Sp. Ph.]. A preparation made by macerating for 12 days with 1,040 grammes of 60-per-cent. alcohol a mixture of 24 grammes of the root of An a cyclus p., 4 of cloves, 12 of tobacco leaves, 60 of guaiac wood, 30 of sa a fra wood, 8 each of the tops of origanum and of thyme, and 2 each of camphor and opium, straining, expre ing, and filtering. [B, 95 (a, 38).] [s. 365]