A revision, of the genus Pteronia (Conipositae). 327 



Known to us only from description. The type is in Herb. Sender. 

 It is evidently one of the section Glabratae. 



J', aizoides, Muschler 



P. caroliniana, Walt 

 P. chamaepeuce, Spreng. 

 p. ,, Tenor e 



P dentata, Spreng. 

 P. echinata, Thunb. 

 P. Engleriana, Muschler 



P.fasciculata, Willi. 

 P. marginata, Herb. 

 I', mi nut a, L.f. 

 P, pauciflora, Sims, 

 P. Porophyllum, Cav 

 P. spinosa, L.f. 



Excluded Species. 



— Pterothamnus Marlothianus, 0. 

 Hoffm. 



— Liatris squarrosa. 

 Cnicus chamaepeuce. 



„ gnaphalodes. 

 Pegolettia baccharidifolia, Less. 

 Aster echinatus, Less. 

 Pterothrix Engleriana, Phillips & 



Hntrhinson, comb. nov. 

 Athanasia fasciculata, Harv. 

 Iimla Cappa. 

 Nestlera humilis, Less. 

 Helipterum virgatum, DC. 

 Adenophyllum Poropliyllum. 

 Hoplophyllum spinosum, DC. 



