INTRODUCTION xi 



Infkagenekic names 



In Christensen's « Index Filicum » and supplements the infragenerio 

 names are placed in alphabetical order like the genera, but this treat- 

 ment has proved unsuitable and I have arranged them otherwise. They 

 are listed here in taxonomical order after the name of the genus to which 

 they belong, with the indication of their rank. 



Subgeneric names are printed in bold-face small capitals [e, g, ; subgen. 



OSMUNDOPTERIS], 



Names of sections and subsections are printed in roman small capitals 

 [e, g, : sect. Lomarioctcas]. 



The type is quoted only for those infragenerio names which were origi- 



typified 



Specific names 



New speci-es, new combinations and new names due to a change of 

 name or in rank published between 1934 and 1960 are printed in bold- 

 face type, irrespective of whether they are legitimate or not. 



The names of the species already listed by Christensen, which have 

 been amended or completed are also printed in bold-face type, but are 

 preceded by an asterisk (*). 



Names of both these kinds are provided wdth full bibliographic reference. 



All the specific epithets are written with a small initial letter. 



The basionyms and the original names which have been replaced by 

 new names are printed in roman types. They are listed in this supplement 

 merely to provide a cross-reference to the new combinations and new 

 names ; thus only their authors are given, without bibliographic reference, 

 which can be found in Christensen's « Index Filicum »> and supplements. 



The wrong terminations of epithets of new combinations taken from 

 the name of a man are corrected according to article 73 and recommenda- 

 tion 73C of the « international Code of Botanical Nomenclature » (edition 

 1961), but the original spelling has been retained in the basionyms. The 

 same procedure has been adopted for the use of a wrong connecting vowel 

 or vowels. Besides these amendments, I have corrected some mistakes 

 which I have found in some names and references ; however, I have always 

 C[uoted after the citation, in square brackets, the original spelling between 

 inverted commas and preceded by the abbreviation err. 



The geographical distribution is given only for the species and infraspe- 

 cific taxa which are listed for the first time in the « Index Filicum »♦ As a 

 rule, the countries quoted in this supplement are those of the type localities. 



Infraspecific names 



Names of subspecies, varieties and forms are not listed in Christen- 

 sen's < Index Filicum d and supplements and are not mentioned in this 

 supplement. The only exception is made for those names of infraspecific 

 taxa which have been raised to specific rank. They are listed here with 

 full citation, geographical distribution and with cross reference to the spe- 

 cies of which they represent the basionyms. These infraspecific epithets are 

 written with small initial letters and printed in bold-face types. 



