Poria attenuata (Peck) Sacc. 



i Microphotograph of cross section of the hymenium, x 160. 

 a Projecting cystidium. 

 b Cross section of a cystidium embedded in the trama. 



2 Vertical section of a part of a single tube showing obliquely 



projecting cystidia. x 320. 



Poria attenuata var. subincarnata Peck 



3 Fragments from specimens in the type collection, x 1. 



4 Mature spores. 



5 Encrusted hypha from the subiculum on the growing margin of 



one specimen. 



6 Unencrusted hyphae as found in the trama and sometimes the 



subiculum. 



124 



