LACTARIAE OF THE UNITED STATES 13 
COLOR-SCHEME USED, AND EXPLANATION OF PHOTOGRAPHIC 
METHODS 
In the description of the colors of the mushrooms, I have used 
the Répertoire de Couleurs published by the Société Frangaise des 
Chrysanthémistes, which contains 365 color-plates, most of the 
colors being produced in four tones. The plates represent living 
rather than metallic colors and are for this reason admirably 
adapted to the use of the mycologist. Іп the description of species 
the numbers in parenthesis after the color refer to the plate and 
tone in the Répertoire. 
For the accompanying plates perfectly fresh representative 
plants were photographed four-fifths natural size on orthochro- 
matic plates. 
The specimens photographed were all collected in the “ Pink 
Beds " region, in the Pisgah Forest reserve, about forty miles south 
of Asheville, North Carolina. 
: Much об this work was completed under the direction of Pro- 
fessor L. M. Underwood, whose assistance and inspiring encourage- 
ment I am glad to acknowledge. Many thanks are due also to 
Professor F. S. Earle for reading the manuscript. 
