286 



GREENHOUSE MANAGEMENT. 



They are increased by cutting up the stems into 

 pieces three inches long and rooting them under the 

 same conditions as the Cotyledon. Soon after the 

 growth starts, suckers and branches will be sent out. 

 It will generally be best, in case an old stem was used 

 for the cuttings, to cut these off and root them, which 

 can be readily done. The Epiphyllums and other leaf 



FIG. 94. A COLLECTION OF CACTI AND ALOES. 



cacti are often grown as standards, by grafting them 

 upon Pereskia stocks. The form of graft used is a mod- 

 ification of the cleft graft and is known as the saddle 

 graft. Among the other desirable forms are the Opun- 

 tias, with their flattened leaf-like stems, the Mammil- 

 larias and Echinocactus, with their spherical forms, 

 and a number of handsome specips of aloes (Fig. 94). 



