376 THE PLANT PHYLA 



Antennaria, Gnaphalium, Helichry- 

 sum, Inula. 



Family 293. Asteraceae. Asters. Herbs and under- 

 shrubs; calyx from bracteose to capil- 

 lary; receptacle naked; usually rayed; 

 medium sized plants. Aster, Solid- 

 ago, Erigeron, Bellis, Baccharis. 



Family 294. Vernoniaceae. Ironweeds. Herbs; 

 calyx from bracteose to capillary; 

 receptacle naked; rayless; style- 

 branches filiform, hispidulous; me- 

 dium sized plants. Vernonia, Ele- 

 phantopus. 



Family 295. Eupatoriaceae. Blazing Stars. Herbs; 

 calyx from bracteose to capillary; 

 receptacle naked; rayless; style- 

 branches thickened upward, papillose; 

 medium sized plants. Lacinaria, 

 Eupatorium, Kuhnia. 



Family 296. Anthemidaceae. Camomiles. Herbs, 

 shrubs, and small trees; calyx a short 

 crown or wanting; receptacle chaffy or 

 naked; usually with white rays; 

 mostly medium sized plants. An- 

 themis, Chrysanthemum, Artemisia. 



Family 297. Senecionidaceae. Groundsels. Herbs, 

 shrubs, and trees; calyx capillary; 

 receptacle naked; rayed or rayless; 

 mostly medium sized plants. Sene- 

 cio, Arnica. 



Family 298. Carduaceae. Thistles. Herbs; calyx 

 mostly capillary; receptacle usually 

 bristly (not chaffy); rayless; mostly 

 stout plants. Carduus, Arctium, 

 Cnicus. 



Family 299. Mutisiaceae. Mutisias. Herbs, shrubs, 

 and small trees; calyx mostly capil- 

 lary; receptacle usually naked; flow- 

 ers all two-lipped, so no proper rays; 

 mostly medium sized tropical plants. 

 Mutisia, Chaptalia. 



