Propagation by Grafting. 



219 



cut shortly below the node, but this is not essential in 

 all plants. 



In this kind of propagation a mild bottom heat is 

 helpful; though it is sometimes carried on during the 

 summer months without artificial heat. 



382. Propagation by Leaf Cuttings. A considerable 

 number of plants, including the bryophyllum, begonia, 

 gesnera and others, readily develop growing points of 

 the stem and roots upon their leaves, a fact often turned 

 to account in propagating these plants. Well-matured 



'■■'■■"■'^"■'"//4'///S//', 



>^.. 





v'i- 



Fig. ]03. Leaf of begonia on surface of propagating bed, forming 

 young plants. (After Bailey.) 



leaves, with the principal nerves cut across on the under 

 side, are held in close contact with the surface of the 

 propagating bed by pegging or by light weights, or the 

 leaf may be cut into pieces, which may be placed in the 

 propagating bed and treated as ordinary green cut- 

 tings (378). 



The leaves of the bryophyllum form rootlets and buds 

 from the notches on their borders wherever these chance 

 to come in contact with a moist medium. 



