Dodge: Heart-Rot of Apple Trees 
9 
This was collected by Mr. Burnham at Pike Pond, July 23, 1910, 
on a fallen apple tree trunk. Just why this was called Polyporus 
Underwoodii and the one on the ash collected by the same person 
at the same place should be called Polyporus admirabilis is not 
clear. This specimen corresponds very well with the text descrip- 
tion of P. admirabilis and to many of the forms collected at Camp 
Columbia. It shows distinctly the tendency both to bracketing 
and clustering. The margin is finely and irregularly scalloped. 
It has the “ glace kid finish ” but is further markedly ribbed and 
streaked with faint zonations in form and color. The depressed, 
funnel-shaped disk is somewhat flesh-colored. The stems are 
quite conspicuous, though short, but the pores extend down to 
the base on the under surface. 
In connection with the question as to the group relationship of 
these forms, a specimen of “Polyporus Underwoodii” from the 
Albany collection is of considerable interest. Lloyd has evidently 
noted the obvious resemblance of these apple tree forms to the 
Melanopus, black stemmed, group of polypores in stating that 
Peck’s P. admirabilis is a variety of P. varius, or belongs to that 
group, though he does not state that any of his specimens of the 
apple tree fungus show a blackening of the stem. This specimen 
of P. Underwoodii found on a willow stump to which I refer was 
collected by H. J. Banker at Schagticoke, N. Y., August 27, 1908. 
It has the general form and size of P. admirabilis with the irregu- 
larly scalloped margin and depressed center. The specimen is 
somewhat weathered and the surface is roughened and blackish- 
spotted. The pore characters are not different. It has a con- 
spicuous, sterile, blackened, eccentric stem and, like a smaller 
specimen of the same collection, bears some resemblance to a 
much exaggerated and unusually thin form (for its size) of 
P. varius. 
Another specimen collected by Dr. Banker August 2, 1904, and 
referred to by Peck in describing P. Underwoodii is still closer to 
P. admirabilis in appearance, but it has the black, though very 
short stipe. One specimen from this collection given to the New 
York Botanical Garden has a central stipe but otherwise resembles 
the 1908 specimen from the same regions. Further collections of 
