90 PRINCIPLES OF PLANT-TKRATOLOGY. 



In the larkspur (Delphinium), especially in double 

 flowers, a larger number of carpels than the normal 



Fni. 98. — Citrus Aurantium (Orange). Secondary orange (whorl of 

 carpels) formed at apex of primary one (as seen in longitudinal 

 section of the latter). 



Fm. 99. — Citrus Aurantium (Orange). Secondary orange (whorl of 

 carpels) formed within the primary one (as seen in longitudinal 

 section of the latter). 



may be laid down in spiral succession on the more 

 elongated axis of the flower. 



