62 Studies of Inheritance in the Japanese Convolvulus 



magenta^ The corolla is not however fully coloured, and it is white at 

 its margin not wholly, but only near each of the five notches of its limb. 

 Such white patch is also called " hukurin," and the words " hukurin" 

 and " white -margined " used below refer always to flowers which are 

 edged with white partially in such way. Both reciprocal hybrids were 

 entirely similar to each other (PI. II, fig. 3). 



(6) F2 Generation. 



The mode of segregation of flower-colour in F^ is rather complex. 

 Not only are there found flowers of white, dark-red, and magenta 

 colour exactly similar to that of the two original parents and the F^ 

 plant, respectively, but we have also those of scarlet colour (PI. II, fig. 4), 

 and in each of these colours — dark-red, magenta, and scarlet — there are 

 three gradations of their intensity, sharply distinguishable from each 

 other. The detailed study of the segregation of flower-colour is now 

 under way, and will be dealt with in a future paper. For the present 

 time, for simplicity's sake, I will call magenta and scarlet simply by 

 the collective name red, and make no distinction of the intensities of 

 colour just noticed. 



The details of the segregation of leaf- and flower-colour in F^ are 

 shewn in Table I. 



TABLE I. 



1 This lies between No. 566 and 571 (Violet rouge) of the " Code des Couleurs." 



2 The letters a—f in the Tables indicate the different individuals of the 6 Fi plants 

 which were bred from. 



