THE РОГУРОВАСЕЖ OF OHIO 
L. O. OVERHOLTS 
Rufus J. Lackland Fellow in the Henry Shaw School of Botany of 
Washington University 
INTRODUCTION 
The Polyporacee, or “роге fungi," constitute a relatively 
small family of the Basidiomycetes, characterized by having 
the spores borne on the interior surfaces of tubes or pores which 
make up the hymenium of the fungus. In its most compre- 
hensive sense the family embraces the two subfamilies Boletee 
and Polyporee, including also such aberrant genera as Merulius, 
Porothelium, Solenia, etc. More often the Boleteg are made a 
separate family, the Boletaceew, usually distinguished from the 
true Polyporacee by the more fleshy nature of the plant and by 
the fact that the pores rather easily separate in a smooth layer 
from the flesh of the pileus. The true Polyporacee, on the 
other hand are more commonly leathery, corky, or woody in 
texture, and only in rare cases are the tubes separable from the 
context. More recently Dr. Murrill, who has monographed the 
North American species of the family for the North American 
Flora—now being issued by the New York Botanical Garden—, 
has still further limited the family so as to exclude not only the 
genera referred to above, but also certain of the true polypores 
which possess a more or less gelatinous or waxy hymenium. For 
the reception of certain of these forms he has erected the family 
X ylophagacee. 
С. а. Lloyd has published monographie papers on certain of 
the sections of the family, using for the most part as the generic 
names, the sectional names given by Fries. Within the past. 
year a third system of classification has been proposed by Miss. 
Ames, of Cornell University, who divides the family into groups 
on the character of the context, and these groups are separated 
into genera on the form of the fruit body, surface modifications, 
spore characters, etc. Various workers in Europe have at- 
ANN. Мо. Bor. GARD., VOL. 1, 1914 (81) 
