SYNGENESIA— POLYG.-SUPERF. Pyrethrum. 43 J 



oblong, angular, abrupt, furrowed, crowned with an ele- 

 vated membranous border. Recept. naked, convex. 

 Herbaceous, very rarely shrubby ; either perennial or an- 

 nual. Leaves either simple and oblong, or repeatedly 

 compound, or variously cut. Fl. terminal, with a yellow 

 disk and white rays ; generally smaller than in the last 

 genus, from which the pi'esent is distinguished by the 

 crown of the seed, and by the narrower, more simple, 

 border of the more oblong and equal calj/x-scales. Fla- 

 vour bitter, often unpleasantly aromatic. Haller seems, 

 by his own account, to have chosen the above generic 

 name in allusion to the acrid roots of his 7i. 96. P. alpi- 

 num of Willdenow, which agree with the plant of the an- 

 tients to which he refers. 



1, P. Parthenium. Common Feverfew. 



Leaves stalked, compound, flat; leaflets ovate, cut; the up- 

 permost confluent. Flower-stalks corymbose. Stem 

 erect. Rays shorter than the diameter of the disk. 



P. Parthenium. Fl. Br. 900. Engl. Bot. t;. 1 8. ^. 123 1 . Willd. Sp. 



P/.U.3.2155. Relh. 334. Hook. Scot. 246. 

 Matricaria Parthenium. Lbi?i.Sp. PI. 1255. Huds.37l. With.735. 



fVoodv.suppl. 1.249. Fl.Dan.t.674. Bull. Fr.t. 203. Dalech. 



Hist. 954./. 

 M. n. 100. Hall. Hist.v. 1.42. 

 Matricaria. RaiiSij7i,lS7. Ger. Em. 652. f. Dod. Pempt. 35. f. 



Trag. Hist. 156./. Brunf. Herb. v. 1.246./. 245. 

 M. nostras. Lob. Ic. 751. f. 

 Parthenium sen Matricaria. Matth. Valgr. v. 2. 258. / Camer. 



Epit. 649./ 

 Artemisia tenuifolia. Fuchs. Hist. 45. f. 

 A. ramosse altera species. Fuchs. Ic. 26./. 

 Feverfew. Petiv. H. Brit. t.\9.f.5. 



In waste ground, and about hedges, frequent. 



Biennial. June, Julij. 



Root tapering. Stem erect, branched, leafy, round, furrowed, 

 many-flowered, about 2 feet high, or more. Leaves stalked, of 

 a hoary green, once or twice pinnate, or pinnatifid ; the leaflets, 

 or segments, inclining to ovate, decurrent, cut. Panide corym- 

 bose, sometimes compound ; the Jower-stallcs long, naked, sin- 

 gle-flowered, swelling upwards. Fl. erect, about half an inch 

 bioad, with a convex yellow disk, and numerous short, broad, 

 abrupt, two-ribbed, white rays ; often wanting j sometimes mul- 

 tiplied, and, the disk being obliterated, constituting a double 

 flower. The seeds are certainly crowned with a short mem- 



2 G 2 



