70 



THE NURSERY-MANUAL 



osiers (as Cornus stolonifera) and many other bushes with 

 long and slender branches, propagate by means of stolons. 

 The black raspberry propagates by a special kind of stolon, 



rooting only 

 at its tip. A 

 layer is a shoot 

 or root, attached 

 to the parent 

 plant, partially 

 or wholly cov- 

 ered with earth, 

 with the inten- 

 tion that it 

 shall take root 

 and then be 

 severed from 

 the parent. | 



The opera- 

 tion or practice 

 of making a 



FIG. 59. Runner of sedge, covered in the leaf -mold. i , i 



state or condition of being layered, with the knowledge 

 relating thereto, is known as layerage. 



The common or natural layers 



Great numbers of plants that do not propagate naturally 

 by means of layers are readily increased by this means under 

 the direction of the cultivator. In most cases it is necessary 

 only to lay down the branches, cover them with earth, and 

 allow them to remain until roots are well formed, when the 

 parts may be severed from the parent. Layering is one of 

 the simplest and commonest methods of propagation, as the 

 mother-plant nurses the layer-plants until they can sustain 



