SVNGENESIA. 45i 



as his B. cernuci) C. coronata is his B. 

 frondosa ; and C kucantlta, B. pilusu. 

 Some species of Coreopsis indeed have 

 never been found without rays. Linnaeus 

 expresses his diflicuhies on this subject in 

 P/iil. Bot. sect. 209, but seems inclined 

 to unite the two genera. A similar am- 

 bii^uity occurs between Goi'tefia and 

 Atnictylh, Relhnnia (of the last Order) 

 and Athanasia^ and in some degree be- 

 tween Centaurea, Engl Bot. L 278, 1678, 

 56, &c., and Carduus. ov Serratuhi ', only 

 the scales of the calyx of Centaurea ge- 

 nerally keep that genus distinct. 



I should be much inclined to abolish 

 this Order. Those of its genera which 

 have rudiments of pistils in their radiant 

 florets, as Rudheckia and lleUanthus, 

 would very conimodiously range with their 

 near relations in Polijgamia superjina, nor 

 are we sure that such radiant florets are in 

 all circumstances abortive, neither can a 

 student often know whether they are so 

 or not. It does not follow, from what has 

 just been observed, that the presence ot 

 radiant florets, whether abortive or notj 



