450 SYNGENESIA— POLYG.-SUPERF. Pyrethrum. 



Engl. Bot. V. 8. t. 540. Curt. Lond.fasc. 6. t. 60. Mart. Rust. 

 1. 1 10. Hook. Scot. 246. Rail Syn. 182. Ger. Em. 743./. Fl. 

 Dan. t. 995. Bull. Fr. t. 339. Clus. Hist. v. 1 . 334./. Lob. Ic. 

 552./ 



Ch. minus. Camer. Epit. 794. f. 



Ch. segetum vulgare glaucum. Moris, d. 3. 15. sect. 6. t. 4./ 1. 



Bellis lutea, foliis profundi incisis, major et minor. Bauh. Pin. 262. 



Corn Marygold. Petiv. H. Brit. 1. 1 9./ 6. 



/3. Chrysanthemum segetum nostras, folio glauco multiscisso ma- 

 jus, flore minore. Raii Syn. 183. 



In corn fields, turnip fields, &c. a troublesome weed. 



Annual. June — August. 



Root tapering, rather small. Herb smooth, of a glaucous green. 

 Stem alternately branched, bushy, leafy, angular. Leaves alter- 

 nate, oblong, variously toothed or cut, rather succulent ; clasp- 

 ing at the base. Fl. numerous, large, terminal, solitaiy, on 

 naked hollow stalks swelling upward, their colour a uniform 

 brilliant yellow. Calyx-scales green, with a broad membranous 

 border. Florets of the radius obovate, two-ribbed, abrupt. Seeds 

 compressed, grooved, smooth, without any crown or membra- 

 nous border, which is erroneously attributed to them by the 

 description in Engl. Bot., the plate of which is correct. 



/3, a variety with more jagged leaves, and smaWerJlowers, was no- 

 ticed near Glastonbury by Plukenet. No other person seems 

 to have met with it. 



However odious to the farmer, especially in his turnip fields, this 

 is indisputably a splendid weed, almost as handsome as Chri/- 

 santhemum coronarium. It can only be eradicated by hand, be- 

 fore the seeds ripen. 



406. PYRETHRUM. Feverfew. 



Hall. Hist. V. 1 . 40. Fl. Br. 900. mild. Sp. PL v. 3. 21 50. G^rtn. 



t.\69. 

 Matricaria. Tourn. t. 281. Lan). t. 678./ 1. 



Nat. Ord. see n. 404. 



Common Cal. hemispherical, closely imbricated, with several 

 oblong, nearly equal, bluntish scales, bordered with an 

 equal membrane all round. Cor. compound, radiant; 

 Jlorets of the disk numerous, perfect, tubular, with 5 equal 

 spreading segments; those of the radius numerous, ligu- 

 late, spreading, elliptic-oblong, with 3 terminal teeth. 

 Filam. in the tubular florets only, capillary, short. Aiith. 

 in a cylindrical tube. Germ, in all the florets angular, 

 abrupt. Style thread-shaped, not prominent. Stigmas 

 spreading, obtuse, somewhat notched. Seed-vessel none, 

 the calyx remaining unchanged. Seed in all the florets 



