62 



TALKS AFIELD. 



of the outer flowers and the less showy in- 

 terior or disk 

 flowers. If we 

 were to cut in 

 two a garden 

 coreopsis, as in 

 Fig. 50, we 

 could readily 

 discern that 



Fig. 50. ,, n 



the yellow rays 

 are not a part of the disk flowers. If from 

 this coreopsis we were to remove all the 

 flowers but two, as in Fig. 51, we should see 

 that the ray flowers bear little resemblance 

 to the disk flowers. The erect disk flower 

 in the centre has minute teeth near its base 

 in the place of a calyx, and the petals are 

 united into a five-parted tube. The flower is 

 therefore one 

 of the Gamo- 

 petalse. The 

 ray flowers 

 have the mi- 

 nute calyx 

 teeth, scarcely 

 shown in the figure, but there is apparently 

 only one petal, which is rolled into a tube 

 below. The end of this petal is furnished 



