258 



Gates. 



the reciprocal crosses were all in bloom by the end of July. In the 

 7 families derived from back-crossing with grandiflora (table III), 

 different families gave different results. The families are determined 

 as "early" or "late" according to the number of plants in bloom 

 on or about August i'". Thus in cults. 68 and 69, from (nihricalyx 

 X grandiflora ) x grandiflora, nearly all the plants were in bloom by 



Fig. 21. (Riibricalyx x grandiflora) X ruhricalyx, 



tr ,- b <= 

 Fohee — . — . 



24 



that date, and these families therefore bloomed as early as the F2 

 offspring from the original crosses. Two other back-crosses of the 

 same series (cultures 67 and 71) bloomed decidedly later, having 

 less than half their plants in bloom by August i^'. These were 

 characterized as "late". Three families (cults. 73, 74 and 78) from 

 (grandiflora x rubricalyx) x grandiflora were "very late", the majority 

 of the plants not beginning to flower imtil September, though aU 



