?& 





••222* 



a 



Fig. 111. 



Cross between two species of poppies, one, a, Papaver nudicaule, 

 having 14 chromosomes (n=7) and the other, c, P. striatocarpum 

 having 70 chromosomes (n— 35). The hybrid, b, has 42 (n=21). 

 d-e, embryo mother cell of hybrid. /, first maturation division of 

 hybrid, anaphase. (After Ljungdahl.) 



