Systematic Pomology and the Plums 5 



It is expected that such citations of names will be used 

 only in elaborate works on pomology, in scientific publications, 

 or in cases where they are necessary for clear discrimination 

 of synonyms. 



3. No two varieties in the same group shall have 

 the same name, and the name first published for n 

 variety must always be used to designate it. All names 

 subsequently published must stand as synonyms. 



The term "group" as here used shall be held to designate 

 the large general groups specified by words in common lan- 

 guage, such as raspberry, plum, apricot. 



PUBLICATION 



4. Publication consists in (a) the public distribu- 

 tion of a printed name and description, the latter giv- 

 ing distinguishing characters of fruit, tree, etc., or (b) 

 in the publication of a new name for a variety properly 

 described elsewhere. 



Such a publication may be made in any book, bulletin, 

 report, trade catalogue or periodical, providing the issue bears 

 the date of its publication, and is generally distributed among 

 nurserymen, fruit-growers and horticulturists. 



5. No one is authorized to change a name for 

 any reason except when it conflicts with these rules. 



Having now arranged for a system of nomencla- 

 ture, we come to the matter of classification. There 

 are some deep, abstruse principles underlying the 

 whole theory of classification which, fortunately, it is 

 impossible to take up in a work like this. In the mat- 

 ter of plum classification, we have practically but one 

 method in use in this country. Even as to the details 

 of carrying out this method there is a somewhat 

 remarkable agreement among American plum stu- 



