64 
HARDY PERENNIALS 
ziesias, Nepetas, Hypericums and Phlox subulata 
may thus be treated, but instead of cutting a 
' tongue ' from one joint to another as in Carnations 
it is sufficient just to 
make a small notch or 
two in the bark on the 
underside of the shoot 
or layer. Many flower- 
ing climbers and flower- 
ing shrubs are also 
readily propagated by 
layering, and Vincas, Polygonums of the trailing 
types, and other plants with many- jointed stems 
may be pegged at intervals of every second or third 
joint, each section being disconnected when suffi- 
ciently rooted. 
Layering Trailers at 
EVERY Joint. 
The Vincas, Nepeta Glechoma, Polygonum 
Vaccinifolium, etc., may thus be propagated. 
