FLOWER-CLUSTERS l6l 



\ 



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. 



Fig. 223. — Centrifugal Inflorescence. 



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



