512 THE AMERICAN NATURALIST [Vol. XLVII 



Another cross was made with two varieties of Java maize, 

 Madoera and Menado, using pollen from the first hybrid of the 

 maize X teosinte cross. The resulting plants varied widely re- 

 garding the stooling ability and structure of the ears. This is 

 not surprising in view of the inequality of the sex cells of the 

 hybrid. 



Seed from the second generation hybrids were sown and that 

 again from the resulting plants, thus securing fourth generation 

 hybrids. These hybrids (fourth generation) while differing 

 widely from each other, remained within the limits of the 

 most different types which appeared in the second generation 

 hybrids. The practical result of these crosses, maize X teosinte, 

 are not very satisfying. The resulting hybrids are far inferior 

 to teosinte for fodder, and although the seed can be more easily 

 harvested from the hybrids than from teosinte, it is not nearly 

 so valuable as that from good varieties of maize. 



The author closes by calling attention to the fact that teosinte 

 is immune from the chlorosis disease of maize which is very prev- 

 alent in Java, but the hybrids of maize and teosinte showed no 

 decrease in sensitiveness to the disease. 



Mary G. Lacy 



Bureau of Plant Industry, 

 U. S. Department of Agriculture, 



