44 MurRILL : POLYPORACEAE OF NorTH AMERICA 
is a caespitose species with slender pruinose stipe, small pellucid 
pileus, ciliate margin and very minute polygonal or sinuose tubes. 
Saccardo considers it the same as P. flexipes Fr. and P. hapalus 
Berk., but these two species do not, so far as I know, occur in the 
West Indies or even in Central America. 
Polyporus Humphreyi P. Henn. Hedwigia, 3'7: 280. 1898. 
From the description of this species it appears to resemble P. 777- 
choloma, but has adnate instead of decurrent tubes with whitish 
fimbriatulate edges. This and the next species are placed here 
because I have not yet examined the type specimens. 
Melanopus marasmioides Pat. Bull. Soc. Myc. France, 18: 173. 
1902. This species is found in Guadeloupe and Martinique and 
is related to Havolus melanopus. It is deeply umbilicate, ochra- 
ceous, with translucent denticulate margin, which is sterile below, 
large shallow radiating tubes and a black central stipe. Undevel- 
oped plants resemble certain species of Xy/aria. An examination 
of the plant is necessary to determine whether or not it properly 
belongs with Polyporus. 
NEw York City. 
