Polyporus induratus Peck 



i Cross section of the hymenium from specimens in the type col- 

 lection, x 160. 



2 Small portion of the trama as seen in cross section and enlarged. 



x 320. 



3 Enlarged lateral view of a vertical section through one of the 



specimens in the type collection. Made with Bausch and Lomb 

 Micro-Tessar lens, x 10. 



Poria laetifica (Peck) Sacc. 



4 Specimen from the herbarium of L. O. Overholts, no. 3431. 



5 Hyphae from the trama and the subiculum. 



6 Mature spores from collection in herbarium of L. O. Overholts, 



no. 3431. 



134 



