147 
This fungus is closely allied to Polyporus adustus, of which it 
might easily be considered a mere variety, but from which it 
differs as P. fragrans does from P. fumosus. Its unequal angular 
pores with thin dissepiments and the absence of a sterile margin 
to the pileus separate it from P. adustus. Its colors are nearly the 
same as in that species. 
CRYPTOPHALLUS gen. nov. 
Receptacle consisting of a stem and pileus bearing the gleba 
on its external surface but covered by the persistent remains of 
the upper part of the volva. 
A genus of Phalleae differing from /tiyphallus simply in hav- 
ing a volva which ruptures in a somewhat circumscissile manner, 
the upper part of it being carried up and remaining on the pileus 
and persistently concealing the stratum of spores. 
It is with some hesitation that I have given generic value to 
this plant, it seemed at first so probable that the persistency of 
the remains of the volva on the pileus was an accidental circum- 
stance. But having received two specimens of the same kind, 
one collected in Kansas and the other in Canada, the probability 
of its being a mere accident seemed greatly lessened and I have 
concluded to recognize the fact in a formal manner. The spori- 
ferous stratum is sandwiched between the surface of the pileus 
and the continuous covering formed by the remains of the volva. 
What purpose in nature is subserved by this arrangement is not 
clear, except that perhaps the spores are less exposed to the rapid 
and sudden washing of heavy rains and are better reserved for 
dissemination and dispersion by the agency of insects. 
CRYPTOPHALLUS ALBICEPS. 
Pileus subcampanulate, about one inch high and nearly as | 
broad, obtuse or rounded at the apex, covered by the whitish re- 
mains of the ruptured volva whose surface is minutely tomentose ; 
stem cylindrical, holluw, 214-4 in. long, 5-8 lines thick, whitish 
or pallid, inserted at the base in the cup-like remains of the lower 
part of the volva; veil none; spores narrowly elliptical, .coo16- 
.0002 in. long, about .0001 broad. 
In acornfield. Kansas. June. Bartholomew. At the base of 
astump. Canada. J. Macoun. 
The species is similar to /typhallus impudicus, except in the 
covering of the pileus. 
