AUGUST, 1893. 
Cell union in herbaceous grafting. 
JOHN S. WRIGHT. 
WITH PLATES XXX AND XXXI. 
n ire work Was done in the winter and early spring of 1892, 
_. *petiments being performed in the greenhouse attached as 
boratory of vegetable physiology of Purdue Univer- 
* methods of grafting were employed, inarching, splice 
g and cleft or wedge grafting. It is needless to 
these well known methods here farther than to say 
’%€ arching method the scion is allowed to remain 
Parent stock until union is formed, while by the splice 
~ 
pepe the stock and scion were held in place by thin 
taffia until union was accomplished when they were — 
% to allow the diameter of the stem to increase. Ae 
uy iM certain stages of growth that herbaceous plants — 
_Sasily grafted; in quite young plants the tissues are 
> ade to survive the injuries inflicted inthe opet- 
in older parts, those past or nearly past the te 
© growth of this tissue. In herbaceous grafting the. 
. aking and 
