COMPOSITOFK FLOWERS 



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 Coni- 

 positae. 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 eircles 



maybe devel- 231. Cornflower or bachelor's but- 

 ton, in which tin- outer flo- 



oped i 11 1 a rets iUV iw ;uul showy. 



long, strap-lih 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 (Pig. 227), bache- 

 lor's button or com 



232 Double dahlias. In one, the florets have de- flower (Fig. 231), ;i!)d 



veloped Hut rays. In tl ilu i, i In- ilnrt'ts ... 



appear as inrolled tubes, held daisy 



These long corolla- limbs are railed,. 

 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 must characteristic sin- 

 gle feature of the composites. 



(Fig. Hi!)). 





f 



V. 



'_:!:! 1 ble larkspur 



Compare it>i Pig. 208, 



