80 VARIETIES. 



ciittino's, layers, or roots ; and even thus a perma- 

 nent character is not secured to them, for being 

 artificial rather than natural productions, they 

 return in time to the state from which they were 

 raised. 



In the gradual disappearance of certain 

 varieties of the Apple, remarkable instances of 

 this propensity have been observed. 



The most permanent and important varieties 

 are usually noticed in Botanical books, and Greek 

 letters are commonly used to distinguish them. 



