ADDITIONAL INTRODUCTION TO THE 1982 EDITION OF THE 

 NATIONAL LIST OF SCIENTIFIC PLANT NAMES 



In publishing the National List of Scientific Plant Names , the Soil Consei^ation 

 Service neglected to include certain parts of the introductory material provided by 

 the compilers. Tliis addendum is provided to correct these oversights. 



Nomenclature 



Certain names of taxa have been checked more fully than others to establish 

 proper epithet spellings, author citations, and/or legitimacy of the names according 

 to the articles of the International Code of Botanical Nomenclature (ICBN). These 

 names have an asterisk following their autEor citation. Original publications have 

 been consulted for most of these starred names. Decisions about the proper spelling 

 and author citation of names were made by Stephen F. Smith under the guidance of 

 Dan H. Nicolson. 



We have omitted from the authority citations the names of authors which would 

 follow the word "in" except for "Alton" and "W. T. Alton." In some instances, we 

 have omitted the authors which would follow "ex" in the parenthetic authority for a 

 basionym, in case one or more of those same persons are cited as authority for the 

 combination referring to that basionym. We have chosen to use "H.B.K." rather than 

 "Kunth" even though Kunth alone wrote Nova Genera et Species Plantarum . 



Illegitimate names of three types are distinguished: (1) unpublished names, 

 (2) superfluous names, and (3) later homonyms which bear the exact same name as 

 earlier published names of different type specimens. In accordance with Article 72, 

 Note 1 of ICBN, a basionym author, either the single author or the author in paren- 

 theses, was the first to publish an epithet in a legitimate name and may not have 

 been the first to publish the epithet. 



Synonyms 



The index is an alphabetic list of all genera, and all names in our source 

 manuals which are rejected for the U.S. regions, and such of the accepted names as 

 are required to show important synonymy. 



Most names in the synonymy list are paired with one to three other, usually 

 accepted, names. Usage of a plant name in the source manuals does not always con- 

 form to the sense implied in this list, and for that reason the accepted names have 

 been furnished with prefixes, such as the sign > , "including," or < , "part of." 

 Since few of our consultants have had the leisure to compare their own circumscrip- 

 tions of taxa with those in all the manuals , most of the prefixes represent compar- 

 isons between manuals. Thus the sign "•— " implies that the two names which it 

 separates have been used in the same sense by one or more pairs of manuals , and so 

 does the symbol "N" imply the same sense, misapplied . Misapplication of names among 

 manuals means that certain manuals chose the incorrect name for a taxon. 



Additional components of some of the prefixes are typologic. The sign 'W 

 indicates that the given names it separates have the same type specimen. All such 

 synonym pairs which do not share the same final epithet and basionym author have 

 been checked in their original publications to establish that they are syntypic. 

 The sign 'i^" replaces "=" where applicable. The left-hand parenthesis, "{", appears 

 where we interpret that our consultant treats the type of a synonym as being 

 included in the circumscription of a name of a different type. The sign is omitted 



