1272 SYNGENESIA. 



C. Florets radiate* 



1516. Madia. Receptacle naked : down o : calyx equal, con-. 



filling of a double row of leaves. 

 1533. Bellis. Receptacle naked; down o : calyx confifting 



. ot a fingle row of equal fcales. 



1545. Matricaria,. Receptacle naked, cylindnco-conic : dozvn o: 



calyx imbricate, with the fcales fcarious 

 at the margin. 

 1550. Lidbeckia. Receptacle naked; down o: calyx many- 

 parted, 



1546. ChrysanthEt Receptacle naked: down o: calyx imbricate, 



mum. with the fcales dilated and membranaceous 



at the margin. 



1547. Pyrethrum. Receptacle naked ; feeds crowned with a 



margin : calyx hemifphasrical, imbricate, 



with the fcates fcarious at the margin and 



rather acute. 

 1561. Colummella. Receptacle naked: feeds crowned with a 



toothed margin : calyx cylindrical : florets 



of the margin undivided. 

 1528. Doronicum. Receptacle naked: down fimple ; florets of 



the margin without down. 

 1527. Arnica. Receptacle naked : down fimple : ftamina of 



the marginal florets caftrate. 

 1525. Inula. Receptacle naked: down fimple: florets of 



the margin very numerous and linear : 



authera with 2 briftles at the bafe. 



1517. Erigeron. Receptacle naked: dozvn fimple; florets of 



the margin very numerous, linear, and 

 narrow. 



1521. So lid ago. Receptacle naked, pitted: down fimple ; florets 



of the margin 5 or 6 remote. 



1524. Cineria. Receptacle naked: down fimple: calyx fim- 



ple, many-leaved, equal. 



1^19. Senecio. Receptacle naked: down fimple: calyx in- 



verted with fcales, many-leaved, equal \ 

 its fcales dead at their tips. 



1518. Tussilago. Receptacle naked; down fimple : calyx fim- 



ple, many- leaved, equai, fomewhat mem^ 

 branaceous, fwelling at the bafe. 



1520. Aster. Receptacle naked: down fimple: calyx im- 



bricate with the lower fcales fpreading ; 

 florets of the margin more than io. 



1537. Boebera, Receptacle naked: down fimple: calyx dou- 



ble ; the outer many-leaved, inner 8* 

 leaved, 



