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



Plate 



Photomicrograph of a Longitudinal Section of a Barley Ovary Immediately 

 AFTER Fertilization. 



Thr> two plumoscstiKDnaHdoTiot appear, a. Outorepidcrmis of ovary; 6, colorless i)arcnchyina; c, 

 f;hloropliyll-bf'!irinj; jjanriifliyrria; d, iniwr opidrrmis of ovary: c, oiitrr inloniiinciit of oviili'; 

 /. inriftr liitt^Kumoiit of ovuln;"(/, oxtcrnal layor of tlio uuccllu.s; h, mict'llur tissue; /, group uf I'li- 

 (Jos{>crm-forinlng cfilLs of the young cm bryo aac. 



