Poria mutans var. tenuis Peck 



1 Microphotograph of vertical section through the hymenium. 



X i6o. 



2 Spores found free-floating in sectional preparations (see text). 



3 Encrusted hyphae from the subiculum. 



4 Hyphae from the trama. 



Poria myceliosa Peck 



5 Specimen from the type collection, x i. 



142 



