10 PREFACE. 



Mr. John K. Small, in Polygonum; Prof. F. Lamson 

 Scribner, in Graminege ; Dr. L. M. Underwood, in Isoetes 

 and in Hepaticse; Mr. George E. Davenport, in Filices; 

 Dr. T. F. Allen, in Characeae; Messrs. Frank S. Collins 

 and Isaac Holden, in Algae ; Dr. Carl Warnstorf, Prof. D. 

 C. Eaton, and Mr. Edwin Faxon, in Sphagnum ; Mrs. 

 E. G. Britton and Dr. Charles R. Barnes, in the other 

 Mosses; Dr. J. W. Eckfeldt, Miss Mary L. Wilson, and 

 Miss Clara E. Cummings, in Lichenes; and Dr. B. L. 

 Robinson, Dr. N. L. Britton, Dr. Thomas Morong, Mr. 

 Walter Deane, and Mr. M. L. Fernald, in various other 

 determinations. The article on the Geology of Mount 

 Desert has been kindly contributed by Prof. William M. 

 Davis, of Harvard College. To these and to all others 

 who have done so much to add to the value and accuracy 

 of this Catalogue, to the various collectors whose names 

 appear therein, and to President Charles W. Eliot of 

 Harvard University, through whose interest and kindness 

 the publication of our work has been made possible, we 

 extend our sincere thanks. 



Acknowledging, as we have at the outset, the incom- 

 pleteness of this Catalogue in many of its divisions, we 

 issue it at the present time to assist those interested in 

 the plants of the Island to the acquirement of a better 

 knowledge of its flora. With this end in view, therefore, 

 it has seemed well to include, for the benefit of specialists, 

 even manifestly incomplete lists of some of the Crypto- 

 gams. The list of Vascular Cryptogams (Pteridophyta), 

 the Ferns and their allies, is fairly complete ; the lists of 

 Mosses and Liverworts are well advancing towards com- 

 pletion, and the same is true of the lists of Lichens and of 

 the marine Algae. Very little work, however, has been 

 done thus far in the collection and determination of the 



