FL O WER- CL USTERii 



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Fig. 221. — Forms of Centripetal Flower-clusters. 



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



Fig. 222. — Centripetal Inflorescence, co«//'«wifa?. 



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



Fig. 223. — Centrifugal Inflorescence. 



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



