226 



FOUNDATIONS OF BOTANY 



anth 



jstig 



pap 



..anth 



\-M 



Fig. 24. —Bachelor's Button. 



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

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

 of anthers. 



Fig. 25. — Flower-cluster of Yarrow {Achillea Millefolium), enlarged. 



A, head seen from above ; B, longitudinal section ; re, receptacle ; ch, chaflf ; 

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



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

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



