FLOWER-CL USTERS 



161 



3 i 3 



\ 



\ 



5 5 



P -4 



FIG. 22i. FORMS OF CENTRIPETAL FLOWER-CLUSTERS. 



i> raceme; 2, spike; 3, umbel; 4, head or anthodium ; 5, corymb. 





FIG. 222. CENTRIPETAL INFLORESCENCE, continued. 



6, spadix ; 7, compound umbel ; 8, catkin. 



*0 * 



\r^ 



r 



2 



FIG. 223. CENTRIFUGAL INFLORESCENCE. 



i, cyme; 2, scirpioid raceme (or half cyme). 



