4 STUDIES OF AMERICAN FUNGI. 



The Pileus in such cases is lateral and shelving, that is it stands 



out more or less like a shelf from the trunk or log, or in other cases 



is spread out flat on the surface of the wood. The shelvmg form is 



^ well shown in 



the beautiful 

 Claiidopus nidii- 

 lans, sometimes 

 called Pleurotus 

 nidulans, and in 

 other species of 

 the genus Pleuro- 

 tus, Crepidotus, 

 etc. These 

 plants will be 

 described later, 

 and no further 

 description of the 

 p e c u liarities in 

 form of the mush- 

 rooms will be 

 now attempted, 

 since these will 

 be best dealt 

 with when dis- 

 cussing species 

 fully under their 

 appropriate ge- 

 nus. But the 

 brief general de- 

 scription of form 

 given above will 

 be found useful 

 merely as an 

 introduction to 

 the more de- 

 tailed treatment. 

 Chapter XXI 

 should also be 

 studied. For 

 those who wish the use of a glossary, one is appended at the close 

 of the book, dealing only with the more technical terms employed 

 here. 



