YUZü HOSI-IINO 
the parent varieties. 
Inheritance of the Flowering Time in the Progenies of the 
Parent Varieties. 
Raising in 1910. 
From every plant which was used as a parent of the cross in the forcing 
house, we collected all pods which had been left untouched and contained 
self-fertilized seeds. As mentioned above, the sowing of those seeds togeth- 
er with the cross products was done on May 21. Besides, we took 100 seeds 
of G- P' and 50 seeds of M- P- from the stock seeds of the Vegetable Garden 
and sowed them at the same time. 
After the sowing of the seeds, dry weather continued, and they germinat- 
ed unevenly. The first sprouting appeared in May 30, and it continued until 
the middle of June. In this case, we can not take simply the number of days 
from sprouting to flowering as the representative value of the flowering time, 
because the late-sprouted individuals have always the tendency to hasten their 
flowering on account of a comparatively high temperature. In fact, by ex- 
amining the flowering time of every individual of the M- P. variety in whose 
offspring we should expect a narrow range and ordinary type of the varia- 
tion, from the results obtained in the raising of the previous winter, we see 
that the number of days from sprouting to flowering was always smaller in 
the later-germinated individuals than in the earlier-sprouted ones. So we 
adaj^t the following formula for finding a representative value of the flower- 
ing time : 
Number of days from sowing to flowering 4- that from sprouting to flowering. 
2 
By calculating the representative values of all M- P- individuals by this 
formula, and arranging them in a frequency distribution table, we obtained the 
result which is shown in Table 4. (The designation L means a family con- 
sisting of 50 plants grown from the stock seeds). In the table, we see small 
ranges and regular types of variation in ail families of the M- P- offsprings. 
