320 SYNGENESIA POLYGAMIA SUPERFLUA. [CL. XIX. 



rating and remaining attached to the germen. Filaments hair- 

 like, very short ; anthers united into a cylindrical 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. maritima. Sea Cotton-weed. The whole plant white and 



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

 tuse, crenate : flowers yellow. Perennial: flowers in August and Sep- 

 tember : grows in sand, on the sea-coast of the south of England : not 

 common. Eng. Bot. vol. ii. pi. 141. Eng. Fl. vol. iii. p. 403. 1169. 



POLYGAMIA SUPERFLUA. 

 23. TENACE'TUM. TANSY. 



Common calyx hemispherical, imbricated, of numerous, oblong, 

 close scales, the innermost membranous at the edges. Compound 

 corolla of two kinds of florets; those of the disk numerous, 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. Germen 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 Tanty. Leaves pinnatifid, deeply serrate. 



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



flowers. The seeds are said to expel intestinal worms. Perennial : 

 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. ARTEMI'SIA. 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. campstris. Fidd Southernwood. Leaves divided into many 



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



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



