Philip Cantino and Michael T. Huft have been very conscientious in analyzing 

 their taxonomy in relation to that of each author of each particular source manual. 

 For this reason, Physostegia , especially, has a very thorough synonymy that shows 

 all its various misapplications of name. For groups for which authorities have 

 given us ranges in addition to accepted names, the ranges of accepted names may 

 differ considerably from what might be expected in reference to the source manuals 

 that use the name. This discrepancy occurs because many manuals may misapply a 

 name or use it more narrowly or broadly than our contributor. 



Additional data accumulated 



The Soil Conservation Service was supplied a tape including (1) the material 

 printed, (2) coded checklists in which the names appear, and (3) distributions for 

 both accepted and rejected names (the lists not cited in print are: "I", McGregor, 

 et al.; "7", Martin ^ Castetter, or Dittmer; "W", Viereck ^ Little; "4", Black 

 Hills; and "X", Balogh) ; a second tape with the names of accepted and rejected taxa 

 attributed only to Hawaii (with a few errors, detectable by synonymy in Kartesz ^ 

 Kartesz) ; and, third, a tape of names peculiar to Regions H, C, or V. 



Further corrigenda 



The last item in the bibliography refers to Region "V", not "C". 



The species Calceolaria scabiosifolia does not belong to the legitimately named 

 Calceolaria of the Scrophulariaceae , but to the later generic homonym in Violaceae. 

 We do not know if it has a legitimate synonym in Hybanthus , but we reject it for 

 the U.S. 



The page-headings for the continent are, of course, inconsistent with our 

 accepting only the names of plants which have grown in the United States. 



Laurence E. Skog is miscited in contributors list. 



Acknowledgment s 



Checklist Processing Assistance 



Dan H. Nicolson was the referee for nomenclature. 



Ellen R. Farr was the referee for genera and helped process synonymy. 

 Joan E. Canfield processed many consultants' reports. 

 Ruth F. Schallert provided library assistance. 

 Gary R. Evans processed some of the manuals. 

 Christine T. Kisler helped process synonymy. 

 David Bridge and his staff handled computer operation. 

 Christine H. Lynch, Beth Lawler d, Linda M. Moreland provided secretarial 

 assistance. 



The List 



This effort is the result of 2 1/2 years' work. The strengths of this endeavor 

 are: (1) its comprehensive coverage of source manuals, (2) its reflection of rela- 

 tionships of names between manuals (usage synonymy) , (3) its attempt to draw from 

 the experience of available specialists, and (4) its start at the incorporation of 

 names, authorities, and typological relationships according to the rules of the 

 ICBN. Its weakness lies in groups where we compilers had to pick and choose 



