COMPOSITOUS 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 Com- 

 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 circles 



maybe devel- 2'51. cornflower or bachelor's but- 

 ton, in which the outer flo- 

 Oped into a rets are large and showy. 



Jong, strap- lil-e or tuhular 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 

 flower (Fig. 231), and 

 field daisy (Fig. 169). 

 These long corolla -limbs are called -^ 

 rays. In some cultivated composites, v^ 

 all the florets may develop rays, as in "^ ^ j'? ? =^j 

 the dahlia (Fig. 232), and chrysan- %V^lv>Jxi^ 

 themum. In some species, as dande- ^PW/^>^!*^^ ^V 

 lion, all the florets naturally have 

 rays. Syngenesious arrangement of 

 anthers is the most characteristic sin- 



„, » , £ -1 •- -^^- double larkspur 



gle teature of the composites. compare with Fie. aoa. 



2.')2. Double dahlias. In one, the florets have de- 

 veloped flat rays. In the other, the florets 

 appear as inroUed tubes. 



