398 BOTANICAL GAZETTE [MAY 
This plant seems to occupy a position in the Polyporeae similar to 
that of Merulius lacrymans and related species in the Meruliae and to 
Coniophora among the Thelephoraceae. It has the same dark dusty 
. Fics. 1-6.—Poria atrosporia: figs. 1, 2, portions of fruiting surface, nat. size; fig. 
, Same, X2; fig. 4, photomicrograph of section through pores, X10; fig. 5, same. 
noe te 6, nicktealoneatanh of spores. 
spore mass and the light colored mycelium forming thin sheets over the 
substratum. The spores of Coniophora cerebella and Merulius lacrymans 
are slightly different in color, being more brown than fuligineous, and 
those of Coniophora cerebella larger than the spores of this species, but 
they are of the same shape (fig. 6). 
