2 LACTARIAE ОЕ THE UNITED STATES 
INTRODUCTION 
ScOPE AND AIM OF THE WORK 
This study of the Lactariae has been limited to the United 
States, since, with the exception of a list of thirteen species from 
Nova Scotia,* and a few species from other provinces of Canada 
preserved in the herbarium of the N. Y. State Museum at Albany, 
no species have been reported from other parts of North America. 
In pursuance of the study the aim has been to observe the living 
plants in the field. Accordingly, for several summers, collections 
were made in the vicinity of Lake Ontario in Oswego County, 
New York. One season was spent in southern Vermont near 
Newfane, and in the summer of 1907 a study of the southern dis- 
tribution of the genus was undertaken in the mountains of North 
Carolina about forty miles south of Asheville in the Pisgah Forest 
reserve, where the Biltmore Forest School is located during the 
summer. 
The field study has been supplemented by the examination 
of dried specimens collected in various states, many of which col- 
lections are the property of the М. Y. Botanical Garden. Among 
these should be mentioned the herbarium of the late Professor L. 
M. Underwood, which contains species from Connecticut, Central 
New York, Indiana, and Alabama ; the Earle collection from Con- 
necticut, Alabama, Mississippi, and southeastern New York; the 
Lactaria herbarium of N. M. Glatfelter, including the specimens 
from which the determinations were made for his St. Louis list t 
as well as several species from Pennsylvania; specimens collected 
on Mt. Desert Island, Maine, by Miss V. S. White ; species from 
Massachusetts collected by G. Morris; collections made in 
Maine, Pennsylvania, District of Columbia, Virginia, and Tennessee, 
by W. A. Murrill; some Delaware species collected by H. S. 
Jackson; collections made near Gainesville, Florida, by H. S. 
Fawcett; and specimens collected in Indiana, by G. W. Wilson. 
Several other collections were loaned to the Botanical Garden, 
thus facilitating the work very much. B. M. Longyear sent for 
* MacKay, A. Н. Fungi of Nova Scotia: a provisional list. Proc. and Trans. 
N. S. Inst. Sci. 11: 122-143. 1904. 
f Preliminary list of higher fungi collected in the vicinity of St. Louis, Mo., from 
1898 to 1905. Trans. Acad. Sci. St. Louis 16: 33-94. 
