PREFACE. 9 



wise would have been locked up in the herbaria and 

 note-books of unknown workers in the same territory. 



Specimens of every plant in this list, with very few 

 exceptions, will be found preserved in the Mount Desert 

 Herbarium, at present kept in Cambridge, Mass. These 

 exceptions, most of which are either Algas or Lichens, 

 are denoted by an asterisk prefixed to the name of the 

 species. For specimens of plants thus marked, as well as 

 for other plants from collectors now unrepresented, we 

 shall be most grateful. 1 The Philadelphia Academy of 

 Natural Sciences, furthermore, has an almost complete 

 duplicate set of the Phanerogams and Pteridophy ta ; and 

 Dr. Carl Warnstorf of Neuruppin, Germany, has a dupli- 

 cate set of the Sphagna. Duplicates from the Herbarium 

 have also been distributed among various public and pri- 

 vate herbaria of the country. 



Much care has been taken to make the Catalogue reli- 

 able. Very few plants have been admitted to the list 

 except on the authority of an undoubted specimen, and in 

 every case of exception only on a positive affirmation by a 

 specialist or other botanist of high repute as to the 

 authenticity and identity of the lost specimen. More- 

 over, we have had the kind assistance of many of the 

 leading botanists of the country in the determination of 

 specimens in difficult families and genera, and in cases 

 of doubtful determination, as well as in the criticism and 

 correction of our manuscript. Prof. L. H. Bailey has 

 given his help in Carex and Rubus ; Mr. M. S. Bebb, in 

 Salix; Prof. William Trelease, in Rumex and Epilobium; 

 Dr. Thomas C. Porter, in Solidago, Aster, and Mentha; 



1 Any correspondence relating to the Flora may be addressed to Edward 

 L. Rand, 740 Exchange Building, Boston, Mass., or to John H. Redfield, 216 

 West Logan Square, Philadelphia, Penn. 



