14} GUIDE TO THE CONSERVATORY. 



from the parents, continue your crosses upon the 

 mule plants. Some florists are apt to think that 

 the mules must all prove sterile ; but this is not the 

 case, as it is now pretty well ascertained that the 

 sterility of the mules, when it occurs, may in some 

 cases arise from the difference of the parents' habits : 

 but whatever you take in hand with respect to the 

 art of hybridizing, do not relinquish your aim at 

 the first defeat, but repeat your experiments, and 

 there is little doubt but in the end you will ac- 

 complish your object. In all cases, previous to 

 the pollen being matured, remove it from the sta- 

 mens of the plant you wish to produce seed. 



