394 



Journal of AgrkulUire, Victoria. [10 July, 1917. 



whicli the cross sections of the ovules are shown in the illustration, 

 however, represent those they occupy when fertilization is completed 

 and when they have commenced to develop. The ten clusters of black 

 dots represent the positions of the vascular bundles, which, as the 

 apple develops, branch into fibro-vascular strands through the fleshy 

 part, bracing the apple together and acting as food channels as well. 



^FiG.2, 



Fig. 



Plate 109. 

 1. — Showing clusters of pollen Fig. 



grains (natural size). 



2. — Showing action of pollert 

 grain during the process of fertili- 

 zation (highly enlarged). 



When the pollen grains, before they commence to ripen, are removed 

 from the anther, they present a rather plump appearance, and are of 

 a silvery white colour. As the process of their ripening advances, how- 

 ever, the pollen turns yellow, and later often becomes dark or reddish 

 brown. 



