The correlation of flower- and fruit-structure in Carica Papaya 



P. J. Wester 



Pap 



dioecious, or 



rarely bearing perfect flowers. The normal staminate flower is 

 funnel-shaped with a long slender tube, the lobes being shorter than 

 the tube and with ten anthers inserted in the throat of the corolla, 

 the pistil being abortive. The normal pistillate flower is larger 

 than the staminate and has distinct petals and a sessile ovary, which 

 is large, round or angular, and contains numerous ovules. The 

 stigma is sessile and five-rayed, with rays ultimately branched to 

 six or more flattened lobes, and the stigmatic area extending a 

 short distance around upon the dorsal surface (fig. I, a; for the 

 sake of clearness only one of the five rays is shown). 



b 



c 



Fig. i. 



about 1/5. ) 



D 



d 



stigma. (Enlarged 



summer 



"& "»c summer ui iyu4 uic dutimuii ui «."v. """■' ■»—■ 



CaI led to a rather unusual difference in the shape and size of the 

 '"dividual fruits on a papaya growing in the garden of the Sub- 

 tr °pical Laboratory. The plant, being old, ceased to bear in the 

 au tumn and died later, but a cutting had fortunately been rooted 

 successfully during the summer, and was planted out in the 



• Recalling the interesting fruits noted on the parent tree, 



*mte 



141 



