CLASS XVIII. ORDER II. 91 



Artemisia. Calyx imbricate, with scales round- 

 ed, converging : egret ; receptacle somewhat 

 villose or nakedish. (Flowers mostly rounded.) 49, 

 55 — ^Leaves pinnatifid — absynthium (wormwood) 

 divisions of radical leaves obtuse, of stem-leaves 

 acutish. %. e — vulgaris^ divisions of leaves all 

 acute and toothed. 2/. — Leaves pinnate— aSrofa- 

 num (southern wood) lower leaves doubly-pinnate, 

 upper ones pinnate filiform. \i . e. — /lontica, stem- 

 leaves doubly-pinnate with linear leafets, flowers 

 nodding. :v. 



Tanacetum. Calyx imbricate, hemispheric : 

 scales acuminate : rays obsolete, 3-cleft : egret 

 somewhat marginal : receptacle naked. (Flowers 

 corymbed.) 49. 55 — vutgare^ (tansy) leaves doub- 

 ly-pinnate. 1^. y. e. 



B. Floivers radiate. 



Chrysanthemum. Calyx hemispherical, imbri- 

 cate, with the scales membranous at the margin : 

 receptacle naked : egret none, or a narrow margin. 

 49. 55 — /d'wcawMfwww, (ox-eyed daisy) leaves clasp- 

 ing obtuse cut-pinnatifid, radical ones obovate. %, 

 \f,~^fiartheniumy (feverfew) corymbed, leaves com- 

 pound, leafets ovate. JJ., e. 



Tagetes. Calyx simple, 1 -leafed, 5-toothed, 

 tubular : florets of the ray 5, permanent : egret 5 

 erect awns : receptacle naked. 49. 55 — erecta, 

 (African marigold) stem erect, calyx angular, 

 leaves pinnate. %. y. e — patula, (French mari^ 

 gold) stem spreading, calyx smooth. %. y. e. 



Bellis. Calyx hemispherical, scales equal : 

 egret : receptacle naked conical ; seed obovate. 

 49. 55 — fierennis, (garden daisy) scape 1 -flowered, 

 leaves obovate. %. b-w. e. 



Pyrethrum. Calyx hemispherical, imbricate 

 with scales acutish and scarious margined : egret 



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