100 
GRAFTING. 
[chap. IV. 
the extremity of the scion is cut through, 
and the central wood shaped like a peg; a 
hole is then bored in the stock to receive the 
scion, and when the one is inserted in the 
other, the bark of the two is brought together, 
so as to make but a very slight scar. 
Cleft Grafting is where the scion is shaped 
at the extremity like a wedge, and a cleft is 
made in the stock to receive it. When this 
kind of grafting is practised with trees and 
shrubs, the head of the stock is cutoff; but 
a modification of it is practised with succu¬ 
lent plants, in which the end of the graft 
having been cut into the shape of a wedge, 
is inserted into a cleft made in the side of 
the stock to receive it, and the line of junc¬ 
tion is covered with grafting wax. The 
tubers of strong common dahlias may be 
grafted in the cleft manner with choice sorts, 
as may the tubers of the herbaceous paeonies 
with scions of the tree-paeony. This last is 
very useful, as cuttings of the Paeonia Mou- 
tan remain weak for several years, while 
roots grafted in July or August will flower 
the following spring. 
Crown Grafting resembles the last kind in 
