HYMENOMYCETES 373 



from the flesh of the pileus. Some species of Boletus have 

 a well-defined collar on the stem, which is attached to the 

 margin of the pileus during the young stage. A similar 

 structure is indicated in some kinds of Polyporus. 



FIG. 116. Fames annosus, a parasite on various conifers, attacking the 

 root, i, a portion of a sporophore ; 2, section of sporophore showing 

 three strata of tubes ; 3, showing the mouths or pores of the tubes. Figs, 

 i and 2, nat. size ; fig. 3, slightly mag. 



Many of the giants of the fungal world are members of 

 the present family. Fistulina hepatica, the beefsteak fungus, 

 sometimes attains to a large size, and has been recorded 



