



a 





c 



Fig. 111. 



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

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

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

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

 hybrid, anaphase. (After Ljungdahl.) 



