APPENDIX 4 

 CHROMOSOME NUMBERS 



Complete list of chromosome numbers in the Pteridophyta (new, emended and verified) 

 introduced throughout the book. The entries under country of origin refer in each case 

 to the source of the cytological material actually used, though greater detail will in 

 many cases be found in the partial lists at the ends of the appropriate chapters and 

 in the text. The treatment of the specific names differs slightly from that of the text 

 in that preference is in this case given to the most technically correct name known to 

 me, although where a familiar name was retained in the body of the book but will 

 now be displaced the synonym is given in brackets to avoid confusion. The use of 

 inverted commas denotes either an invalid name according to the principles of nomen- 

 clature, which has been retained from lack of a suitable synonym, or the application 

 of a valid name to more than one thing, one of which if not both will need a new 

 specific epithet when further work has been done. The order of arrangement of the 

 genera of ferns follows Christensen's Index Filicum, supplement 1934, except where 

 a genus has had to be split to conform to the cytological evidence. 



2n 



72 



Repro- 

 duction Chapter(s) 



Normal 



84 



Normal 



126 

 126 



17 



Normal 7 



Normal 7 



302 



