Bui. 183, U. S. Dept. of Agriculture. 
Plate III. 
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Photomicrograph of a Longitudinal Section of a Portion of a Barley Grain 
in the Embryonic State. 
a, Inner area of the endosperm, with starch grains; b, outer and younger area just forming, with few 
starch grains and large nuclei; c. aleurone layer; d, integuments and pericarp; g, fragments of 
glumes. 
