LICHEN FLORA OF THE UNITED STATES V 



"Very much to my regret, space is lacking to mention at various points in 

 the manual the specific aid rendered by some of these workers and others. Finally, 

 it is impossible to enumerate the names of American botanists and other persons 

 who have encouraged me to go forward with what would have been otherwise an 

 impossible task." 



Thanks are also due to Professor E. B. Mains and Professor H. H. Bartlett 

 for helpful suggestions and criticisms, to Mr. J. L. Lowe for help in preparing 

 the keys and arrangement of the species, to the several collectors of material, to 

 those who so kindly lent herbarium material for study, to the Smithsonian Insti- 

 tution for the loan of plates, to the Field Museum, and to Mr. G. D. Smith of 

 Richmond, Kentucky, for several of the photographs. It is impossible to list all 

 those who have contributed to the completing of this manual. 



In completing the manual and preparing the manuscript for publication, it 

 has been the earnest wish of the writer that the lifelong efforts of Professor Fink 

 might be preserved and made available to students in the field of lichenology. 



Joyce Hedrick 

 (Mrs. Volney H. Jones) 



