470 



COBB AND BARTLETT: INHERITANCE IN OENOTHERA 



ingly different from the rest of the plant as to look exactly like 

 bud sports. On the whole, it is impossible to draw any sharp 

 line between the various phases of f. typica, although in table 2 

 a wholly arbitrary division into "normal f. typica" and "defec- 

 tive f. typica" has been made. The variations appear to be 

 somatic, and highly subject to environmental conditions. Our 

 hypothesis is that the freely segregating factor for flatness, in- 

 troduced by the /S gamete of strain C, only suffices to insure 

 normal blade development under the most favorable environ- 

 mental conditions. 



TABLE 3 



Analysis of F2 Seedling Cultures Grown from Normal typica Parents Be- 

 longing TO THE Fi Progeny of the Cross mut. formosa E X mut. latifolia C, 

 (Lexington E-5-199-28 X C-22-13-87). As Shown in Table 4, all but 

 AN Insignificant Number of the Flat-Leaved Plants were t. typica, 

 and the Re volute- Leaved Ones were mut. formosa 



Four plants of this culture were mut. nummular ia. 



