[Vol. 2, 1915] 



164 ANNALS OF THE MISSOURI BOTANICAL GARDEN 



Family 295. Eupatoriaceae. Blazing-stars. Calyx from 

 bracteose to capillary; receptacle naked; without rays; style 

 branches papillose. Medium-sized plants, with opposite and 

 alternate leaves. Lacinaria, Eupatorium. (Species 944.) 

 (Pf. 4 5 :131.) 



Family 296. Anthemidaceae. Camomiles. Calyx a short 

 crown or wanting; involucral bracts with scarious margins; 

 receptacle chaffy or naked; usually with white ray flowers. 

 Medium-sized plants, with alternate leaves. Anthemis, 

 Chrysanthemum, Artemisia. (Species 915.) (Pf. 4"': 207.) 



Family 297. Senecionidaceae. Groundsels. Calyx capil- 

 lary; involucral bracts mostly 1-seriate; receptacle naked; 

 flowers mostly yellow, with or without rays. Medium-sized 

 to large plants, with alternate leaves. Senecio, Arnica. 

 (Species 1982.) (Pf. 4 5 :283.) 



Family 298. Carduaceae. Thistles. Calyx mostly capillary; 

 involucral bracts multiseriate ; anthers tailed; receptacle 

 usually bristly (not chaffy) ; without rays. Mostly stout 

 plants, with alternate leaves. Carduus, Arctium, Cnicus. 

 ( Species 1563. ) (Pf. 4 5 :312.) 



Family 299. Mutisiaceae. Mutisias. Calyx mostly capil- 

 lary; receptacle usually naked; flowers all two-lipped. Medium 

 to large (even woody) plants, of tropical or warm regions, 

 with mostly alternate leaves. Mutisia, Chaptalia. (Species 

 550.) (Pf. 4 5 :333.) 



Family 300. Lactucaceae. Lettuces. Calyx mostly capil- 

 lary ; receptacle usually naked ; flowers all strap-shaped. Small 

 to medium-sized plants, mostly with a milky juice, and with 

 alternate leaves. Lactuca, Hieracium, dehor him, Leontodon, 

 (Taraxacum). (Species 1701.) (Pf. 4 5 :350.) 



