H. M. Leake 219 



form is comparable to type 11, a type which is found cultivated in the 

 Punjab. 



The conclusions drawn from the results obtained from the series 

 derived froTu the direct crosses as described above, receive confirmation 

 from a second series obtained from crosses between the Fi generation 

 and the parental type. Owing to illness and consequent limitation of 

 the working period, it became impossible to complete the records of 

 this season and a part of this series had to be abandoned. The some- 

 what meagre records which were obtained are tabulated in Table VIII. 

 The number is too small to admit of any numerical comparison, the 

 character of the offspring can alone be considered. In all cases 

 involving one pair of characters only, the cross with the dominant 

 parent has given only dominant and intermediate forms and that with 

 the recessive parent only recessive and intermediate forms. In the 

 single instance in which two pairs are concerned the cross between 

 the intermediate form (RrYy) and the parent possessing both dominant 

 characters (RRYY) has given offspring similar to the pure dominant 

 {RRYY and RRYy) or to the F, intermediate {RrYY and RrYy), 

 while that with the parent possessing both recessive characters has 

 given, in addition to the form with both recessive characters, three of 

 the four recognisable intermediate forms, that with a red (or red on 

 yellow) flower and colour extending to the veins {RrYy), that with red 

 on white flower and colour extending to the veins (Rryy) and that 

 with a yellow flower {7-rYy). These forms are, in all cases, such as 

 would be expected. In the one case where the recessive only has been 

 obtained, the number of individuals (2) is too small to make the 

 absence of the intermediate form a matter of any moment. 



Before concluding this section the cross between type 3 and 

 type 10 may be briefly referred to. It has been already shown (p. 213) 

 that the pale yellow of type 10 is recessive to the full yellow of types 2 

 and 4, and from the experiments last quoted it is apparent not only 

 that a yellow underlies the red in the petal of type 3, but that this 

 yellow is identical with the full yellow of type 4. It would, from this, 

 appear probable that the cross between type 3 and type 10 would be 

 comparable with the cross between the two types 3 and 9 just dis- 

 cussed. This expectation is borne out in experiment. The plants of 

 the -f, generation of this cross are in all their petal characters similar 

 to those of the cross between type 3 and type 9, that is of the form 

 which has been denoted by the term red on yellow. In the F^ genera- 

 tion four types of plants as distinguished by their petal colour appear: 



