366 TEXT-BOOK OF FUNGI 



times placed so close together as to resemble irregular 

 pores. In both the genera named it is not unusual to 

 find one portion of the hymenium of a specimen distinctly 



FIG. 109. Poria vapor aria, showing the adnate sporophore 

 covered on the free surface with irregular pores. This is one 

 of the commonest of British fungi, growing on dead fallen 

 branches, etc. Nearly nat. size. 



lamellar or gill-like in structure, whereas another portion 

 is as distinctly composed of pores or tubes. In some 

 species of Merulius the tubes are exceedingly shallow 



