Poria mutans (Peck) Sacc. 



1 Specimens from the type collection, x i. 



2 Mature spores. 



3 Hyphae from the subiculum and the trama. 



4 Microphotograph of cross section of the hymenium. x i6o. 



Poria mutans var. tenuis Peck 



5 Specimens from the type collection, x i. 



140 



