364 FUNGUS-FLOKA. 



**** Veil absent; gills deeply decuirent; pileus lateral, 

 sessile, or produced behind into a short, oblique, stem-like 

 base. 



II. DniIDIATI. 



Pileus distinctly lateral, not marginate behind ; not resu^^i- 

 nate at first. 



III. Eesupixiti. 



Pileus at first resupinate, then reflexed, sessile; gills radi- 

 ating from an excentric point. 



* Pileus fleshy, uniform in texture. 



** Pileus fleshy, striate, upper layer gelatinous, or, covered 

 with a viscid pellicle. 



*** Pileus membranaceous, not viscid. 



EXCENTRICI. 



* Veil forming a ring. 



Pleurotus corticatus. Fr. 



Pileus 4—8 in. across, flesh thick, hard, white, convex then 

 expanded and almost disciform, horizontal, always entire, 

 everywhere covered with a dense greyish do^Ti when 3 oung, 

 and as the pileus expands the down becomes broken up into 

 floccose squamules on a whitish ground, margin strongly 

 incurved when young; gills very decurrent, anastomosing 

 behind, also dichotomously branched, rather distant, white 

 but becoming yellowish when old ; stem l-o in. long, up to 

 i in. thick, solid, hard, rooting, more or less excentric, curved 

 and ascending, almost equal, squamulosely fibrillose, white : 

 ring cottony-floccose, thick, white, torn into shreds that at 

 first adhere to the stem and margin of pileus, but finally 

 disappear. 



Agaricus (Pleurotus) corticatus, Fries, Epicr., p. 129; Cke., 

 Hdbk., p. 101 ; Cke., Illustr., pi. 290. 



On trunks. 



