10 Inheritance in the Japanese Convolvulus. Part II 



detail the ancestors of these families. The seeds of these families were 

 taken from the individuals which segregated in the following manner 

 ini^3: 



Scarlet Deep scarlet Dark-red Deep dark-red Totals 



^'°-" Irene", '\ I I % ??!'» 



The family 44 — 6 was the offspring derived by self-fertilisation from 

 a plant having green leaf and dark-red flower. Consequently if the 

 hereditary behaviour of these characters were normal we should have in 

 the offspring leaves which are constantly green and flowers which are 

 either constantly dark-red or will segregate into dark-red and deep dark- 

 red. The results, however, have shewn that notwithstanding the fact 

 that the flower-colour is constantly dark-red the leaf-colour segregates 

 into 3 green and 1 yellow. So that it may be considered that there 

 occurred some permanent variation among the factor or factors in the 

 F^ plant used for self-fertilisation. But we cannot decide how and where 

 such change has occurred, and any hypothesis on this point would be 

 useless unless founded on the facts actually obtained, so that this case 

 will remain the subject of my future study. 



IV. Hybrids between J. or 5 with a race G which has 



YELLOW leaf AND DEEP DARK-RED FLOWER. 



In all cases described till now there were found no yellow plants 

 with dark-red flowers, except the case given above. Such a plant, how- 

 ever, is found among certain races of Japanese Convolvulus, and it seems 

 to have been in cultivation more than 60 years ago, as it is described in 

 a book entitled Santo Ittyo published in 1854, in which many coloured 

 figures are found. My material is characterised by having the " hukurin " 

 part on the margin of the flower. Although I have described the flower- 

 colour of this race as deep dark-red, I found that certain differences are 

 discernible between B and C, inasmuch as the colour of the latter is a 

 little darker than that of the former. They are, however, so similar to 

 each other that this slight difference would not be noticeable without 

 direct comparison. 



1. A xC and G x A, 

 a. Fi generation. 



In both reciprocal crosses I obtained exactly the same results, the 

 leaf being yellow and the flower light magenta. The " hukurin " appeared 

 in quite the same manner as in the parent G. 



