A GENETICO-PHYSIOLOGICAL STUDY ON THE FORMATION ETC. 
45 
brown paleas were extracted witli alcohol for a long time, and the extract was 
tested for cliromogen. Practically no red colour was found by reducing nor 
by heating with hydrochloric acid. 
Ct CL 
Text fig. 2. Showing the anomalous sec- 
torially pigmented paleas. Born on the 
panicle of which spikelets were self 
purple, a, a same spikelet ; b, V, same 
spikelet seen from the different sides. 
p, purple area. 
Among the F :> plants certain ano¬ 
malies which are worthy of mention, 
were found. 
Two spikelets born on a panicle of 
a plant which bore the red awn and 
yellow paleas, possessed the brown in¬ 
ferior palea. 
Two spikelets born on a panicle 
of a plant having the spikelets which 
bore a purple awn, paleas and glumes 
were sectorially pigmented with purple 
and yellow (see text fig. 2.) 
Tw o grains were found in a single 
spikelet in one of the spikelets of a 
normal plant. The spikelet of Oryza 
sativa normally bears only one grain. 
In one plant, both paleas, inferior 
and superior were found to bear awn. 
The anomalous awns tvere short and 
red coloured. Normally, the infeiior 
palea only possess a long awn. 
In one of the spikelets born on a panicle of a plant, the lodicules were 
found to be modified to small palea-like appendages which were narrow and 
sharply pointed. 
(d) The Relation Between the Colour of the 
Grain and the Paleas. 
It is of interest to observe the difference in the kind of cliromogenic sub¬ 
stance of the brown pigments in the awn and the grain. The colour of the 
grain of most of the Japanese varieties is pale buff but in few, reddish brown. 
