Tanacetitm.] COMPOSITE. 151 



16. Artemisia. Linn. Wormwood, Mugwort. 



Involucre ovate or rounded, imbricated. Receptacle naked or 

 hairy. Florets of the ray awl-shaped. Pappus none. — 

 Named from Artemis, the Diana of the Greeks. 



Syngenesia. Superflua. 



1. A. marilima, Linn. Sea Wormwood. Erect; leaves 

 downy, bipinnatifid, with linear segments ; flowers in racemes, 

 oblong ; receptacle naked. Hooker. Br. FL 1 . p. 355. 



a. racemes drooping. A. maritima, E. Bot. t. 170G. E. FL 

 v. iii. p. 407. 



/3. racemes erect. — A. gallica, Willd. — E. Bot. p. 1706. t. 

 1001. (A. marit.) 



Sea shores and in salt marshes, where the two varieties may he seen 

 growing together, and sometimes from the same root. Hooker. On 

 the sutten side of Howth, and sea shore opposite Portran the seat of 

 George Evans, E?q. abundant. Fl. Sept. % . 



2. A. Absinthium, Linn. Common Wormwood. Leaves 

 bipinnatifid, clothed with short silky down ; segments lanceo- 

 late ; flowers hemispherical, drooping ; receptacle hairy. Br. 

 FL 1. p. 355. E. FL v. iii. p, 408. E. Bot. t. 1230. 



Waste places and about villages, in dry soil in many parts of the 

 country. Plentiful near the town of Howth. At Cape-Clear island ; 

 Mr. J. Drummond. FL Aug. %.— One to H foot high, erect. Panicle 

 of flowers erect, leafy. Floral-leaves undivided. Flowers dingy 

 yellow, rather large, hemispherical ; florets of the ray very short.— 

 Aromatic and bitter, and has been much employed in medicine. 



3. A. vulgaris, Linn. Mugwort. Leaves pinnatifid, their 

 segments white and downy beneath ; flowers somewhat ra- 

 cemed, ovate. Br. FL 1. p. 356. E. FL v. iii. p. 409. E. 

 Bot. t. 978. 



Hedges and waste places, common. Fl. Aug. % .— Stems 3— 4 feet 

 high, furrowed. Segments of the leaves deeply cut, dark green above, 

 white beneath. Flowers woolly, brownish. 



17. Tanacetum. Linn. Tansy. 



Involucre hemispherical, imbricated. Receptacle naked. Florets 

 of the ray trifid, obsolete, sometimes wanting. Fruit crowned 

 with a membranous margin or pappus. — Name, altered from 

 Athanasia, being a, not, and Oavuros, death, or that which 

 does not easily fade. Syngenesia. Superfiua. 



1. T. vulgare, Linn. Common Tansy. Leaves bipinnatifid, 



inciso-serrate, naked. Br. FL 1. p. 355. E. FL v. iii. p. 405. 



E. Bot. t. 1229. 



Borders of fields, road sides, and hilly pastures ; generally near 



towns and village?. Fl. Aug. 11.— One to three feet high. Flowers in 



