234 ODOROGRAPHIA. 



163^ C, also Trichamomillol, C^qH^qO^. This last is the deep 

 blue, viscid portion of the distillate ; it has a very mild odour, boils 

 at 270^'-300^ C, and forms a deep indigo-blue vapour.* This body 

 also occurs, together with ahsinthol,C^Q H^^ 0, boiling at 195^ C, 

 in the essential oil of wormwood {Artemisia ccbsintJium),-f in the oil 

 of Pilchurim beans:|: and in the oil obtained by the dry distillation 

 of Galbanum. 



The " Common Feverfew^," Matricaria Parthenivm,^ also called 

 Pryetlirum Pa.rthenium and ChrysaMthemum Fartheniiiin, is a 

 much stronger plant than the last, the leaves are much more cut 

 and lobed like the oak. Its leaves are of a very bright green. Its 

 flower heads have flat or only slightly convex receptacles and all 

 the florets ligulate. The scales on the receptacle are not 

 membranous. All parts of the plant have a strong unpleasant 

 smell and bitter taste. 



Anthcmis cotula]] is a common weed in the South of England, 

 w^here it is called " Stinking May-weed," on account of its in- 

 toleraljly disagreeable odour. Its leaves differ from those of the 

 true Chamomile (A. /lohilis) in being quite smooth, not downy. The 

 essential oil contained in the glands with wdiich the surface of this 

 plant is covered causes swelling of the hands of persons employed 

 to pull the plant up as a weed. 



Tansy. 



Tanacetum vulgare, AVoodville, Med. Bot., t. 115. Tanace- 

 turn is a genus of perennials belonging to the tribe CorymbiferaB, 

 and allied both in characters and properties to Artemisia. 



T. vidgare, the common Tansy, is an herbaceous plant, native of 

 England, found sometimes in moist pastures and sometimes where 

 the land is very dry, e^'en thriving in a chalky soil. In a deep 

 rich soil it attains a height of nearly two feet, but on calcareous 

 soil is more stunted (and the odour less rank). Its root is 



* Kachler in Ber. Deutsche. Cliem. Ges., iv., p. 86. 

 + Ann. Cheni. Pharm., clxx., p. 290. 

 ij: Jahresber. Cliem., 1853, p. 514. 

 § Sowerby, Eng. Bot., t. 1231. 

 II Sowerby, Eng. Bot., t. 1772. 



