Poria subacida (Peck) Sacc. 



1 Microphotograph of cross section of the hymenium from speci- 



men in the type collection, x i6o. 



2 Microphotograph of cross section of the hymenium from speci- 



mens in the New York State herbarium, collected by C. H. 

 Peck at Floodwood, N. Y. x i6o. 



3 Enlarged microphotograph of a small part of the hymenium of 



Poria subacida var. tenuis Peck, from specimens 

 in the type collection, showing projecting cystidialike bodies. 

 X 320. 



4 Enlarged microphotograph of a small part of the hymenium of 



P. subacida, showing cystidialike bodies, x 320. 



5 Hyphae from the subiculum. 



6 Hyphae from the trama. 



7 Mature spores. 



160 



