234 'I'^ll' INIIKRi rAMCE OF THE FLOWERING TIME IN PEAS AND RICE 
Notice: Ilcrcaftci', we sh;ill denote the plants of a late parent by Roman 
numerals and those of an early parent by arable fissures, and in the 
crosses, the antecedent will be tlie seed parent, the subseciuent, the 
pollen parent. For example, II x lO will denote the product of 
the No. 2 [)lant of the late parent variety crossed with the No. lO 
plant of the early parent variety. 
We took 20 .seeds from each of the selected 19 individuals and sowed 
them on Miiy 6, together with 80 .seeds (in 4 rows) of each parent varieties. 
Sprouting took place evenly, during the two days May 14, 15. 
The frequency distribution of the number of days from sowing to flower- 
ing in the F.^ and parent varieties is shown in Table 2. Reserving the dis- 
cussion of the results of the present experiments for a later chapter, we shall 
simply enumerate here the chief facts observed. 
1. The variation ranges of the F^ families extend from the range of the 
early parent to that of the late parent. But there does not appear any trans- 
gressive variation. In the fcUiiily II x 13.5, however, there is one individual 
whose flowering date excedes the variation range of the late parent; and it 
was an exceedingly dwarf (12.5 inches) and weak plant. This abnormal 
retarding of the flowering time might have been caused by insufficient light 
and nutrition, as it grew amidst the other stouter and larger plants. 
2. By summing up the frequencies of each class perpendicularly in the 
table, we see a class which has a comparatively small number of frequencies 
situated at about the middle of the variation means of both parent varieties 
(class 55). As this fact has a great bearing on our experiments throughout, 
we shall designate this class as the iniiiiinujn ffequency class. The individuals 
which flowered before this class (this class inclusive) shall be considered as 
belonging to the early ßoweriiii^ group, those which flowered after the class, 
as belonging to the lale flowering group. 
3. In the early flowering group the white-flowered individuals are more 
numerous than the red-flowered ones, and in the late flowering group the 
white-flowered individuals are exceedingly few, and indeed fewer than the red- 
