VERNALIiiATION 



AND PhOTOPERIODISM 



Plate 10 

 to face p. 96 



Figures 9-11. — Cross-sections of stems of Biloxi soybean: 9, Ab- 

 normally large and distorted parenchyma cells of "dud" plant grown in cool, 

 short photoperiods (Magnification .52 times that of figures 10 and 11). 10, 

 Non-flowering stem of young plant before induction. 11, Flowering stem of 

 plant grown in warm, sliort photoperiods. 



