66 



INFLORESCENCE. 



Plate XXI 



General subject. Name each figure. "Where are the staminata flowera In 

 fig. 2 — the pistillate flower ? Difference between figs. 5 and 8 ? What kind of 

 inflorescence at fig3. 9 and 10? Is there any perfect verticil ia this plate? 

 What is the arrangement at fig. 6? What two Forms of the Head — and ia 

 what plants ? Is the Umbel at fig. 5 simple, or compound ? What are its sub- 

 divisions called? What arrangement at fig. 11? Which of these figaresde- 

 velope their flowers centripetally — which centrifugally ? 



