Bui. 183, U. S. Dept. of Agriculture. 



Plate III. 





» 



•>^ 



V 



w3» 



>*:••,-•/ 



IV. 



f 





' V 





5 *->? P^:-. ^UA r-'^, ,^, ,rj V'-'^'v^'*" . ' , ' ' •:' i 



Photomicrograph of a Longitudinal Section of a Portion of a Barley Grain 

 IN THE Embryonic State. 



a, IniuT arf«i of thn c-n'loMpnrm, wllh Hturcli ftniltis; h, ouIit uri'l yoiiiiKorunMi jii.sl, rornilriK, wIMi few 

 .Ht-iroh KTnina aw\ largo nuclei; c. alcurono layer; </, intnuiirriciilH iiml iiorlf.irp; g, fragiuuiilH of 

 gliimcf). 



