SYNOENESIA. 455 



'tis his B. cernua ; C. coronata is his jB. 

 f random ; and C. leucantha, B. pilosa. 

 Some species of Coreopsis indeed have 

 never been found without rays. Linnceus 

 expresses his difficulties on this subject in 

 Phil. Bot. sect. 209, but seems inclined 

 to unite the two genera. A similar am- 

 biguity occurs between Gorteria and 

 Atractylis, TLelhania (of the last Order) 

 and Athanasia, and in some degree be- 

 tween Centaurea, Engl. Bot. t. 278, 1678, 

 56, &c, and Car dims or Serratula ; 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 Hudbeckia and Helicuiihus^ 

 would very commodiously range with their 

 near relations in Polygamia supcrjlaa, nor 

 are we sure that such radiant florets are in 

 all circumstances abortive, neither qan a 

 student often know whether they are so 

 or not. It does not follow, from what has 

 just been observed, that the presence of 

 radiant florets, whether abortive or not. 



