158 CLAteb XVII. 



fleshy bases, emargin ate and pointed ; egret plumose, sessile. -(garden 

 artichoke.) 



B. florets tubulous ; flower discoid. 



EUPA'TO'RIUM. Calyx imbricated (rarely simple) oblong; style long 

 cloven halfway down ; egret pilose, scabrous, or rough papillose ; re- 

 ceptacle naked: seed smooth and glandular, 5 striate. (boneset 

 ihoroughwort, joepye.) 



Order 2. Polygamia superflua. Florets of the disk perfect 

 those of the ray having pistils only. 



A. Flowers discoid; the ray florets being obsolete. 



TANACE'TUM. Calyx imbricate, hemispheric ; scales acuminate, rays 

 obsolete, 3-cleft ; egret somewhat marginal ; receptacle naked. (Flow- 

 ers corymbed.) (tansey.) 



GNAPHA'LIUM. Calyx imbricate with the marginal scales rounded, 

 scarious, shortish, glossy, coloured; receptacle naked ; egret pilose 01 

 plumose, scabrous ; florets of the ray subulate, of the disk entire. 

 Sometimes all the florets are perfect. (life everlasting.) 



B. Flowers, radiate ; the ligulate ray florets very manifest. 



(Receptacle naked.') 



AS'TER. Calyx imbricate, the inferior scales generally spreading, 

 egret simple, pilose ; receptacle often deep pitted. Florets of the ray 

 more than 10, except in a few species ; colour purple or white, never 

 yellow. (star-flower.) 



SOLIDA'GO. Calyx oblong or sub-cylindric, with oblong, narrow, 

 pointed straight scales, imbricate, closed upon the flower; ray florets 

 about 2, and fewer than 10, lanceolate, 2-toothed, equal to, or shorter 

 than the calyx; filaments capillary, very short; style thread form, 

 equalling the length of the stamens, stigma cleft, spreading; egret 

 simple, pilose, scabrous; receptacle furrowed with dots or punctures; 

 seeds oblong ovate. (golden rod.) 



CHRYSANTHEMUM. Calyx hemispherical, imbricate, with the scales 

 membranous at the margin ; egret none, or a narrow margin. (ox- 

 eyed daisy, fever-few.) 



Exotic. 



BEI/'LTS. Calyx hemispherical; scales equal; egret 0; receptacle 

 conical ; seed obovate. (garden daisy.) 



TAGE'TES. Calyx simple, 1-leafed, 5-toothed, tubular: florets of the 

 ray about 5, permanent; egret 5 erect awns. (marigold.) 



(Receptacle chaffy or hairy.} 



AN"THEMIS. Calyx hemispherical ; scales with scarious margins, 

 nearly equal ; e^gret 0, or a membranous margin : florets of the ray more 

 than 5 ; receptacle chaffs flat, with a rigid acuminate apex ; seed crown- 

 ed with a membranous border or egret. (may-weed, chamoinile.) 



Order 3. Polygamia Frustranea. Florets of the disk per- 

 fect^ those of the ray having neither stamens nor pistils. 



HELIAN"THUS. Calyx imbricate, sub-souarrose, leafy ; receptact 



