226 



FOUNDATIONS OF BOTANY 



pap 



anth- 



FIG. 24. Bachelor's Button. 



I, a tubular flower (magnified) ; anth, the united anthers ; II, fruit (magnified) ; 

 III, fruit, vertical section (magnified); IV, a neutral ray-flower; 1 V, ring 

 of anthers. 



FIG. 25. Flower-cluster of Yarrow (Achillea Millefolium), enlarged. 



A, head seen from above ; J5, longitudinal section ; re, receptacle ; ch, chaff 

 i, involucre ; r, ray-flowers ; d, disk-flowers ; c, corolla ; s, stigma. 



1 This is not precisely homologous with the ray-flowers of Helianthus and most 

 rayed Compositse, but is an enlarged and conspicuous tubular flower. 



