[Vol. 10, 1923] 



382 ANNALS OF THE MISSOURI BOTANICAL GARDEN 



Explanation of Plate 



PLATE 17 



a. Regenerated root of horseradish developing from some tissue other than the 

 epidermis or cortex. 



b. Regenerated part of horseradish showing direct connection with the cambium. 



c. Regenerated bud of the sweet-potato developing in a manner similar to the 

 root in the horseradish in a. 



(Camera-lucida outlines V 143.} 



