1913.] PUBLIC DOCUMENT — No. 31. 185 



Turning now to a discnssion of the tabulated data, Table 1 

 shows the results of crossing varieties with light pink flowers 

 with white-flowered sorts, where only light pink and white- 

 flowered plants resulted. Some such crosses gave pink-flowered 

 plants, and these are given in Table 2. The results shown are 

 generally in accordance with Mendelian expectation, assuming 

 the light pink blossom to be dominant over white. There are 

 two cases where a white-flowered parent has colored offspring. 

 It is possible that in the cross Ked Valentine and Giant String- 

 less this is due to error in observation of the color of the flowers 

 of the parent plant on account of the effect of bagging to insure 

 self-fertilization, this having a tendency in some cases to check 

 color development. The same may be said regarding the similar 

 case in Red Valentine X Mohawk. The case of the single light 

 pink plant in Golden-eyed Wax X Giant Stringless is unex- 

 plained. ScJme departures from the numerical expectation are 

 recorded. A marked excess of white-flowered plants occurs in 

 the crosses involving Golden-eyed Wax, and a similar excess is 

 shown in later tables when this variety is involved. 



