226 
THE PLANT WORLD. 
is actually present for the reason that the embryo has undergone 
several days’ development at a low temperature. As a result, the 
leafy shoot (plumule) of the embryo extends to the apex of the 
endosperm/whereas, in the unsprouted kernel, the proportions of 
the embryo would be as shown in Fig. 41, which includes, how¬ 
ever, only the embryo and a small portion of the adjacent endo¬ 
sperm. It will be further noted in Fig. 40, that a rootlet pro¬ 
jects beyond the basal end of the grain (at the right-hand ex- 
termity) ; the full length is not shown, as it was four or five 
times the length of the whole grain. A second rootlet, as yet 
undeveloped, is seen as a dark conical mass nearby. At the 
other end of the endosperm the withered and hardened remnants 
Fig. 42. A portion of upper end of the scutellum, and of the adjacent 
aleurone layer ( Al. ), under high magnification. Scu. Epi., scutellar epi¬ 
thelium. 
of the style are visible (st., Fig. 40). One can trace the tissue of 
the style down into the pericarp on each side of the endosperm, 
passing, on the upper side, between the plumule and the endo¬ 
sperm. This position of the pericarp is due to the circumstance 
