268 THE INIIERt TANCK OF THE FI-OWERING TIME IN PEAS AND RICE 
was limited, and could accommodate 50 pots only; threfore we could not raise 
more than 500 individual plants each year. 
l^ecause it is difficult to record the time of flowering in the rice plant, we 
took a record of the time when the first spikelet appeared above the ligule of 
the sheath (shooting time) as the representative period of precocity. Mr. S. 
Kato, who has had much experience in the pollination of rice, informed the 
author that the rice plant is not absolutely self-poll inizing and that natural 
crossing often occurs. So we took care to envelope with paper bags all ears 
from which we were intendin"- to take seeds for further raisinfj-.s. 
Raisings. 
In 1909 
As the result of the crosses between K- P. find A- P. in the previous year, 
we got 9 grains in ^ K- P. x JA- P- and none in ^ A. P- x S K- P. 
On the 7th of May, we soaked the nine hybrid seeds with some of both parents 
in a forcing house. When the plantlets began to grow, we planted them in 
pots and put them in the glass house. 
The number of days from soaking to shooting was as follows : — 
K. p. X A. p. K P. A. P. 
,No. I... .92 /No. I.. ..115 
No. 2 93 
Pot I ^No. 3.... 94 Pot III 
I No. 4 94 
\No. 5.. ..93 
|No. I. ...89 
No. 2 99 
No. 3.. ..95 
No. 4... 100 
Av 94 
No. 2 
No. 3, 
No. 4 
iNo. 5 
Av. .. 
,115 
/No. I. ...86 
No. 2.. ..80 
...116 PotlvJNo. 3.. ..82 
..112 
..108 
■••US- 
No. 4.. ..85 
iNo. 5.. ..85 
Av 83.8 
Pot II 
Average of the parents = 98.5 
From this result, we see that the shooting time of the hybrid F-^ is inter- 
mediate between those of both parents, but inclining rather towards that of 
the early parent. This inclination is in the opposite direction in the case of 
Fj^ in pea hybrids (pages 233 and 242). 
