REDUCTION DIVISIONS IN THE POLLEN MOTHER 

 CELLS OF ALLIUM TRICOCCUM 



CONTRIBUTIONS FROM THE HULL BOTANICAL LABORATORY 215 

 WITH PLATES XXVIII-XXX AND ONE FIGURE 



MILDRED NOTHNAGEL ' 



Reprinted lor private circulation from 

 The Botanical Gazette, Volume LXI, No. 6, June 1916 



