[Vor. 1 
84 ANNALS OF THE MISSOURI BOTANICAL GARDEN 
been either the incomplete ‘“‘mushroom”’ books or such extensive 
works as 'Sylloge Fungorum' and in more recent years the mono- 
graph presented in the ‘North American Flora.’ 
In the matter of citation and nomenclature an attempt has 
been made to follow the rules and recommendations of the Inter- 
national Botanical Congress at Brussels. Since there has been 
little opportunity to compare specimens of our plants with those 
of Елторе or with type specimens, the procedure in the matter 
of synonymy has been very conservative. The only names 
cited as synonyms are those of which the writer has a personal 
knowledge gained from the examination of authentic material, 
usually species described from Ohio. Where there has been a 
doubt as to the identity of a plant in this country with that of 
one in the old world the procedure has been to use the name 
under which it has been described or known in this country. 
The first and therefore the most complete set of specimens is 
in the herbarium of the writer; a set of all of the more common 
forms is in the herbarium of Dr. Bruce Fink, of Miami Univer- 
sity, at Oxford, Ohio; a partial set is in the state herbarium, at 
Columbus; and a large number of species, sent to Dr. Murrill for 
determination and verification, are in the herbarium of the New 
York Botanical Garden. 
The writer is under deep obligations to the following persons 
in various ways: First of all to Dr. Bruce Fink, under whose 
direction the work was begun, whose aid, criticism, and advice 
has made this publication possible; to Dr. W. A. Murrill, of the 
New York Botanical Garden, for many kindnesses in verifying 
and determining specimens sent to him, and for the privilege 
of studying the specimens in the herbarium at that place; to 
Mr. C. G. Lloyd, of Cincinnati, for the privilege of working in 
the Lloyd Library and Museum and for determinations of speci- 
mens; to Rev. G. Bresadola, of Trient, Tyrol, for determination 
of specimens; to Dr. E. A. Burt, of the Missouri Botanical 
Garden, for access to his herbarium and for suggestions as to the 
final form of the paper; and to all who have aided in the work 
by sending specimens and in various other ways. 
It is hoped that the paper will be found useful not only to 
Ohio students but in the neighboring states of the Great Lakes 
