Figure 5. An apex similar 

 to that in Figure 4 as seen 

 from above; indications as 

 before. 



Figure 6. Young floral apex 

 of Aquilegia formosa, show- 

 ing, in acropetal sequence, a 

 bract with axillary bud and 

 primordia of sepals and sta- 

 mens. The tier containing the 

 growth centers (which are 

 not visible) lies closer to the 

 tip of the apical meristem. 



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Figure 7. An older apex than 

 that shown in Figure 6, with 

 several tiers of primordia 

 (bracts, sepals, petals, and sta- 

 mens). (After Tepfer, 1953.) 



