THE PROPAGATION OF PLANTS 213 



(Fig. 106) 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 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. 



