ON THE INIIERIFANCH OF THE FLOWERINJ TIME IN PEAS AND RICE 
SUMMARY. 
The fixity of the character of the flowering time in the original varieties 
of peas is estal)lishcd experimentally and the presence of two pure lines 
in the population of one variety is also established. 
The flowering time of the is not intermediate between the parents, but 
inclines towards one of the parents ; in peas towards the late parent, and 
in rice towards the early parent. 
The variation range of families covers the combined range of both 
parent varieties, but their variation type is not the ordinary one. Indivi- 
duals, whose flowering time is just intermediate between those of the 
parents, are very few in number and sometimes absent (minimum fre- 
quency class), while in the ordinary variation type there should be the 
largest number of flowering individuals. 
By raising F3 and F^ families in peas, it is ascertained that the inheri- 
tance of the flowering time follows the Mendelian law. 
The inheritance of the flowering time in peas can be interpreted by pro- 
posing (i) the presence of two Mendelian factors which differ in their 
effects, and (2) gametic contamination caused by hybridization whose 
nature is not yet explainable. 
From variation types of F^, F.^ and F3 families in peas, it is seen that the 
hereditary difference of the two pure lines is not quantitative but qualita- 
tive : i. e. the number of the factors is not different but the quality of the 
factors is different in both pure lines. 
Our material was not sufncient to propose a definite interpretation for the 
inheritance of shooting time in the rice varieties, but the hypothesis of 
three alleromorphic pairs does not positively conflict with the actual 
results, as far as our experiments go. 
The correlation between flower colour and flowering time in peas can be 
satisfactorily explained by assuming gametic coupling between colour 
factor and one of the two factors for flowering time. 
