Fruit-bud Formation of Pear and Apricot 
Plate 6 
A. —Cross-section through a Royal-apricot anther, January 1, 1923, showing the pollen mother-cell 
stage. Note the large nuclei in the mother cells. (X approximately 371) 
B. —Cross-section through a Royal-apricot anther, February 14,1923, showing the tetrad stage in the 
development of pollen. Each member of the tetrad ultimately becomes a pollen grain. (X approxi¬ 
mately 557) 
C. —Mature pollen grains in cross-section of a Royal-apricot anther, February 21, 1923. (X approxi¬ 
mately 138) 
