ft8 CLASS XVIL 



fleshy bases, emarginate and pointed ; egret plumose, sessile. fgarden 

 artichoke.) 



B. Florets tubulous ; flower discoid. 



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

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

 ceptacle naked; seed smooth and glandular, 5 striate. (bonesei 

 thoroughwort, 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-eleft , 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 eniiie. 

 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 

 y el low. (star-flower.) 



SOUDA'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; 

 seech oblong ovate. (golden rod.) 



CHRYSAN'THEMUM. Calyx hemispherical, imbricate, with the scales 

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

 eyed daisy, fever-few.) 



Exotic. 



BEL"LIS. Calyx hemispherical ; scales equal ; egret ; receptacle 

 ionical ; seed obovate. (garden daisy.) 



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

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

 (Receptacle chaffy or hairy.) 



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

 aearly equal ; egret 0, or a membranous margin : florets of the ray more 

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

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



Order 3. Polygamia Frustranea. Florets of the disk per 

 feet, those of the ray having neither stamens nor pistils. 

 HEUAN"TH T J8. Calyx imbricate, sub-so uarrose, leafy ; receptacl 



