COMPOSITOUS FLOWERS 143 



the top, c. The style projects at e. 

 The five anthers are united about 

 the style in a ring at d. Such 

 anthers are said to be synge- 

 nesious. These are the various 

 parts of the florets of the Com- 

 posite. In some cases the pappus 

 is in the form of barbs, bristles, or 

 scales, and sometimes it is want- 

 ing. The pappus, as we shall see 

 later, assists in distributing the 

 seed. Often the florets are not all 

 alike. The corolla of those in the 

 outer circles 



maybe devel- 23 1- Cornflower or bachelor's but- 

 ton, in which the outer flo- 



oped into a rets are lar e and showy. 



long, strap-like or tubular part, and 

 the head then has the 

 appearance of being one 

 flower with a border of 

 petals. Of such is the 

 sunflower (Fig. 177), 

 aster (Fig. 227), bache- 

 lor's button or corn 



232. Double dahlias. In one, the florets have de- flower (Fig. 231), and 

 vel oped flat rays. In the other, the florets . /T ^. i/r\\ 



appear as inroUed tubes. field daisy (rig. Io9;. 



These long corolla -limbs are called 

 rays. In some cultivated composites, 

 all the florets may develop rays, as in 

 the dahlia (Fig. 232), and chrysan- 

 themum. In some species, as dande- 

 lion, all the florets naturally have 

 rays. Syngenesious arrangement of 

 anthers is the most characteristic sin- 



, _ , ., 233. Double larkspur 



gle feature of the composites. compare with rig. 208. 



