364 FUNGUS-FLORA. 



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

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

 base. 



II. DlMIDIATI. 



Pileus distinctly lateral, not marginate behind ; not resupi- 

 riate at first. 



III. EESUPINA.TI. 



Pileus at first resnpinate, 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. 



EXCENTKICI. 

 * 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 down 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 dichotomou^ly branched, rather distant, white 

 but becoming yellowish when old ; stem 13 in. long, up to 

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

 and ascending, almost equal, squamulosely fibrillose, white ; 

 ring cot tony -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., 

 Hdb'k., p. 101 ; Cke., Illustr., pi. 290. 



On trunks. 



