320 SYNGENESIA POLYGAMIA STJPERFLTJA. [cL. XIX. 



spurs, finally separating and remaining attached to the germen. 

 Filaments hair-like, very short ; anthers united into a cylindri- 

 cal tube, as long as the corolla. Germen oblong, slender. 

 Style thread-shaped, as long as the stamens ; stigmas obtuse, 

 spreading. Seed oblong, compressed, bordered at each side 

 with the spurs of the corolla ; seed-down none. Receptacle 

 convex, covered with oblong, hair-tipped scales. Name from 

 dis, two, and ous, an ear, in allusion to the seed. 387. 



1 . D. maritime/,. Sea Cotton-tceed. The whole plant white and 



cottony : stems about a foot high, branched : leaves lance-shaped, 

 obtuse, crenate : flowers yellow. Perennial : flowers in August and 

 September : grows in sand, on the sea-coast of the south of Eng- 

 land : not common. Eng. Bot. vol. ii. pi. 141. Eng. Fl. vol. iii. 

 p. 403. 1169. 



POLYGAMIA SUPER FLU A. 



23. TENACETUM. TANSY. 



Common calyx hemispherical, imbricated, of numerous ob- 

 long, close scales, the innermost membranous at the edges. 

 Compound corolla of two kinds of florets ; those of the disk nu- 

 merous, perfect, tubular, regular, with a five-cleft limb ; those 

 of the ray few, without stamens, tubular at the base, with a 

 flat three-cleft limb. Filaments hair-like, very short ; anthers 

 united into a cylindrical tube. Germeu inversely egg-shaped, 

 compressed. Style thread-shaped, as long as the stamens; 

 stigmas obtuse, recurved. Seed oblong, angular, crowned 

 with a slight membranous border. Receptacle convex, dotted, 

 naked. Name altered from athanasia, undying. 388. 



1. T.vulgdre. Common Tansy. Leaves pinnatifid, deeply serrate. 

 Stems two or three feet high, terminating in a corymb of yel- 

 low flowers. The seeds are said to expel intestinal worms. Pe- 

 rennial : flowers in July and August : grows in the borders of fields, 

 and by roads: common. Eng. Bot. vol. xviii. pi. 1229. Eng. Fl. 

 vol. iii. p. 405. 1170. 



24. ARTEMTSIA. WORMWOOD. 



Common calyx roundish, imbricated, of rounded, close scales, 

 membranous at the edges. Compound corolla of two kinds of 

 florets : those of the disc numerous, perfect, tubular, their limb 

 with five segments ; those of the ray few, destitute of stamens, 

 generally without a petal, or awl-shaped, entire. Filaments 

 hair-like, very short ; anthers united into a cylindrical tube. 

 Germen small, egg-shaped. Style thread-shaped, as long as 

 the stamens; stigmas involute. Seed inversely egg-shaped; 

 seed-down none. Receptacle nearly flat, naked or hairy. 

 Named after Artemis, or Diana. 389. 



1. A.campe'stris. Field Southermoood. Leaves divided into many 



linear segments ; stems at first prostrate, after flowering erect. 



Nearly two feet high : leaves smooth on the upper side, downy 



