2.-JO ON THE INHERITANCE OF THE FLOWERING TIiME IN PEAS AND RICE 
3. Endosperm character : The distuiction bctw^cen Oryza sntiva and 
O. glutinosa is based only on the difference of their endosperm character. 
The endosperm of the former contains common starch, while that of the latter 
contains a kind of dextrin. V>y huskin<j, we can easily distinguish two kinds 
of endosperm at a glance. Husked grains of 0. saiiva present a light brown- 
ish and glassy appearance, and those of O. ghitiiiosa a whitish and opaque 
appearance. We took one ear from every Y ^ plant, husked all grains and 
examined their endosperm characters. In every ear there were two kinds of 
grains and the ratio of sativa grains to glutinosa grains was approximately 
3:1. These facts show that in the endosperm of rice there appears xenia as 
in the case of maize. The starch character dominates the dextrin character 
and these characters segregate according to the simple Mendelian law. 
At this point, the author wishes to take the liberty of claiming his priori- 
ty in investigation on the existence of the immediate effect of pollen on the rice 
endosperm. Having been interested in the fact that the rational interpreta- 
tion of the occurrence of xenia in grains of some cereal crosses, such as in 
maize and rye, had become possible by the discovery of double fecundation 
by Nawaschin (1898) and Guignard ( 1 899), the author made two cross- 
ings of rice, ^ glutinosa x % sativa, one in a green house of the College 
Botanic Garden in May 1901, and another in a paddy field in August of the 
same year. In the former crossing, he got 6 hybrid grains and in the latter, 
12 hybrid grains. As these crossings were executed by cutting off the upper 
part of the glumes, and as the hybrid grains were exposed to the air, their 
color had become so darkened that it was impossible to distinguish by out- 
ward appearance whether their endosperms were starchy or of dextrin. So 
the h)-brid grains were cut and soaked in iodine solution. All hybrid grains 
turned violet just as in the case of the grains of sativa, while self-fertilized 
glutinosa grains changed to brown color. It showed perfectly the presence 
of xenia in the rice endosperm, and the author published this result in a 
Japanese journal, the Journal of the Sapporo Agricultural Society, Vol. Ill, 
jjp. 90-92, April, 1902. As the author left Sapporo for America and Europe 
