Mr. Olney of Providence went in 1849 to make some special collections. 

 From all these sources valuable names have been gleaned for the list, al- 

 though few in number. 



Doubtful specimens have been submitted to Dr. Gray, Dr. Sereno Wat- 

 son, Rev. Thomas Morong, Prof. Daniel C. Eaton, Dr. George Vasey, and 

 Prof. L. H. Bailey, Jr., and all have most kindly given decisions. Mr. 

 Warren Upham, of the United States Geological Survey, revised my state- 

 ments in regard to the geology of Nantucket County, drawn indeed from 

 articles of his on the same subject. I have many a pleasant memory of 

 the various attentions of Mrs. Matthew Starbuck and other Nantucket 

 friends, sending me specimens of what they thought would interest me, 

 and taking me out to ponds and swamps innumerable, when I was on the 

 island; I am indebted to others still for valuable information about island 

 matters beyond my own memory ; I mention by name Mr. William R. 

 Easton and Mr. Frederick C. Sanford, but all will please accept my hearty 

 thanks. 



It is cause for regret that there is no herbarium in which all the plants 

 of the catalogue may be seen together ; but the Gray Herbarium at the 

 Botanic Garden in Cambridge, contains probably all of the rarer species, 

 and many of them are in the herbarium of the Springfield Botanical So- 

 ciety, while specimens both rare and common are in the possession of 

 most of the collectors named in these pages. 



I know, myself, and hold in faithful remembrance, many more favors 

 and kindnesses than I have told from all who have given friendly aid, 

 but to set them forth to others would take a small volume. To these 

 friends and to all lovers of the fair science who pursue its study on our 

 breezy commons and by our blue ponds, I dedicate my work, hoping it 

 may guide to the pleasant paths where the compiler and her helpers have 

 walked in many happy seasons. M. L. o. 



SPRINGFIELD, MASS., July 1, 1888. 



