1915] 



BESSEY PHYLOGENETIC TAXONOMY 163 



urinating on the one hand in the Eupatoriaceae, and on the 

 other in the Lactucaceae. (Pf. 4 5 : 87.) 



Family 287. Helianthaceae. Sunflowers. Calyx not capil- 

 lary ; receptacle chaffy ; usually with ray flowers ; mostly large 

 and coarse plants, with leaves usually opposite. Helianthus, 

 Zinnia, Rudbechia, Silphium. (Species 1364.) (Pf. 4 5 : 210.) 



Family 288. Ambrosiaceae. Eagweeds. Calyx not capil- 

 lary ; receptacle chaffy ; without ray flowers ; mostly large and 

 coarse plants, with leaves usually alternate, flowers diclinous. 

 Ambrosia, Xanthium. (Species 74.) (Pf. 4 5 :220.) 



Family 289. Heleniaceae. False sunflowers. Calyx not 

 capillary; receptacle usually naked; with or without rays; 

 anthers tailless ; medium-sized plants with opposite and alter- 

 nate leaves. Helenium, Gaillardia. (Species 449.) (Pf. 

 4 5 :251.) 



Family 290. Arctotidaceae. Gazanias. Calyx not capil- 

 lary ; receptacle naked ; anthers tailless. South African plants 

 with mostly alternate leaves. Gazania, Arctotis. (Species 

 278.) (Pf. 4 5 :307.) 



Family 291. Calendulaceae. Marigolds. Calyx not capil- 

 lary; receptacle naked; anthers tailed. Old World plants, 

 mostly tropical, with alternate leaves. Calendula. (Species 

 125.) (Pf. 4 5 :303.) 



Family 292. Inulaceae. Everlastings. Calyx from bracteose 

 to capillary ; receptacle usually naked ; anthers tailed ; usually 

 rayless; mostly low plants, with alternate leaves. Inula, 

 Antennaria, Gnaphalium, Helichrysum. (Species 1580.) (Pf. 

 4 5 :172.) 



Family 293. Asteraceae. Asters. Calyx from bracteose 

 to capillary; receptacle naked; usually with rays. Medium- 

 sized plants, with alternate leaves. Aster, Solidago, Erigeron, 

 Bellis. (Species 1815.) (Pf. 4 5 : 142.) 



Family 294. Vernoniaceae. Ironweeds. Calyx from brac- 

 teose to capillary; receptacle naked; without rays; style 

 branches hispidulous. Medium-sized plants, with mostly alter- 

 nate leaves. Vernonia. (Species 788.) (Pf. 4 5 :120.) 



