Class XIX. Order II. 283 



Order II. SUPERFLUA. Florets of the disc 

 with stamens and pistils, those oj the ray with pistils only ; all 

 fertile. 



315. ARTEMISIA. Receptacle mostly naked ; down 

 none ; ray none ; calyx imbricated with roundish con- 

 nivent scales. 



316. CONYZA. Receptacle naked ; down simple or 

 rough ; calyx imbricate, roundish ; florets of the 

 margin three cleft. 



317. GNAPHALIUM. Receptacle naked ; down feath- 

 ery or rough ; calyx with scarious, coloured scales ; 

 florets of the margin subulate. 



D. Flowers radiate. 



318. CHRYSANTHEMUM. Receptacle naked; down 

 none ; calyx hemispherical, imbricate, with the scales 

 dilated, and membranous at the margin. 



319. INULA. Receptacle naked ; down simple ; 

 calyx imbricate ; rays numerous ; anthers with two 

 bristles at base. 



320. ERIGERON. Receptacle naked ; down simple ; 

 florets of the margin very numerous and narrow, 



linear. 



321. SOLIDAGO. Receptacle naked, pitted; down 

 simple ; florets of the margin from five to ten, remote ; 

 calyx imbricate, closed. 



322. SENEGIO. Receptacle naked ; down simple ; 

 calyx invested with scales, many leaved, equal ; the 

 scales dead at their tips. 



323. ASTER. Receptacle naked ; down simple ; 

 calyx imbricate, with the lower scales spreading : 

 florets of the margin commonly more than ten. 



