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TEXT-BOOK OF FUNGI 





even, and cystidia are absent. There is a distinctly marked 

 subhymenial layer, which readily separates resupinate 



FIG. 103. Stereum frustulosum, one of the simpler 

 forms of Stereum having the sporophore entirely adnate 

 to the matrix as in Corticium. i, a dense group of 

 plants growing on a piece of oak wood ; 2, section 

 through the sporophore showing several distinct zones 

 or layers, a feature characteristic of this species; 3, 

 section of a portion of the hymenium, showing two 

 basidia, each bearing four spores at its apex, also three 

 paraphyses roughened on the surface with minute par- 

 ticles of oxalate of lime. Fig, i, nat. size; the others 

 mag. 



species of Stereum from Corticium. In the simplest forms 

 the sporophore is adnate, in others laterally attached to the 



