EAST: INTERCROSSES BETWEEN SELF-STERILE PLANTS 151 



interesting to note that the plants of both cross No. 2 and cross No. 3 

 fell into the three groups as if they were samples of the same popula- 

 tion. There were 40 plants of Cross No. i, and 13 plants of the 



TABLE II 



Plants of Fi Generation of Reciprocal Cross between N. forgetiana and N. 

 alata, Grouped in Accordance with their Behavior in Intercrosses 



Plants 0-39 are products of the cross; plants 40-52 are products of its reciprocal 



