Fig. 751: Erigeron philadelphicus: a, habit, basal part of plant, x %; b, flower 

 head, showing the little-imbricate phyllaries and the numerous linear-filiform rays, x 

 2; c, achene and pappus, the bristles of one series short and those of the other series 

 long, X 12; d, habit, upper part of plant, x %; e, ray flower, the corolla linear-filiform, 

 the stigma lobes linear and obtuse, x 8; f, disk flower, the corolla tubular, the stigma 

 lobes broad and triangular-tipped, x 8. (From Mason, Fig. 355). 



