169 ) 



CLASS XIX. 

 SYNGENESIA. 



Many of the Sciences are evidently pursued, and considered as proper ob- 

 jects of study for all refined minds, merely on \ccount of the intellectual 

 pleasure they afford ; merely because they enlarge our views of nature, 

 and enable us to think more correctly with regard to the beings and ob- 

 jects surrounding us." Sir H. DAVY. 



I. POLYGAMIA ^EQUALIS. 



* Corolla of each floret ligulate. 



236. HYPOCH/ERIS. Receptacle chaffy ; seed down feathery ; calyx 

 somewhat imbricated. 



238. CICHORIUM. Receptacle slightly chaffy ; down chaffy, shorter 

 than the seed ; calyx double. 



235. CHE PIS. Receptacle roughish ; down simple, partly stalked ; 

 calyx double, outermost lax, tumid, deciduous. 



234. HIERACIUM. Receptacle almost naked, dotted ; down sim- 

 ple, sessile ; calyx imbricated, ovate- 



233. APARGIA. Receptacle naked, dotted ; down feathery, sessile, 

 unequal and various ; calyx double, innermost imbricated. 



a 



