214 



PRACTICAL PLANT PROPAGATION 



ROBINIA. Locust. 



*SEEDS. Soak in hot water or scald before sowing. 

 CUTTINGS. Soft wood of R. hispida and other species in Summer. 

 *RooT CUTTINGS. R. viscosa and R. hispida especially are propa- 

 gated by this method. 



GRAFTING. R. hispida is grafted upon R. pseudacacia. 

 ROMNEYA. Matilija Poppy. 

 SEEDS. Germinate poorly. 

 ROOT CUTTINGS. 

 ROSE. (See pages 85, 161,-169.) 

 RUBUS. Raspberries. 

 SEEDS. Grow easily. 

 DIVISION. Divide clumps for varieties. 

 ROOT CUTTINGS. Take cuttings three inches long. Good root 



system by this method. 



LAYERS. The red Raspberries are especially easy to tip layer. 

 (See fig. 44.) Pinch out the terminal buds of branches layered 

 and several plants may be obtained instead of one. (See also 

 fig. 103.) 



Fig. 103. Rubus propagation. Shows method of increase. 

 Sketch by George W. Oliver 



