32 



FRIEDA COBB 



TABLE 11 



Analysis of the FI generation of the cross mut. formosa X /. typica M (homozygous) (a'ftff X a'pFF). 

 The staminate parent belonged to the F 3 generation of the cross mut. formosa X mut. latifolia C. 



Each culture contains only flat-leaved plants. Of the 181 plants grown to maturity, taken 

 in part from each of the six cultures, 160 proved to be f. typica,- and the remaining 21 were of 

 other flat-leaved types 16 were mut. dimorpha, 1 was mut. fallax, 1 was mut. grisea (an 

 undcscribed mutation), and 3 were undetermined. 



TABLE 12 



Analysis of the F 2 generation resulting from self-pollination of f. typica plants chosen at ran- 

 dom from the F\ generation (see table 11) of the cross mut. formosa X /. typica M (homozygous) 

 (a'jSJfX a'(3FF). Each of the cultures contains flat-leaved and revolute-leaved plants in approx- 

 imately a 3:1 ratio. 



