378 FUNGUS-FLORA. 



lateral, very short or almost obsolete, rather coarsely downy 

 at the base ; gills determinate, narrow, crowded, simple, 

 greyish. 



Agaricus (Pleurotus') acerosus, Fries, Syst. Myc., i. p. 191 ; 

 Cke., Hdbk., p. 108 ; Cke., Illustr., pi. 242c. 



On wood, among leaves, on gravel, &c. 



Very variable, flaccid, greyish-brown, becoming pale, re- 

 sembling Cantharellus lobatua in appearance. Attached by 

 spreading white mycelium when growing on Sphagnum in 

 swamps. (Fries.) 



III. EESUPINATI. 



* Pileus fleshy, uniform in texture. 



Pleurotus porrigens. Pers. 



Entirely white. Pileus 23 in. long, and about 1-1- in. 

 broad ; flesh thin, tough ; sessile, at first resupinate then 

 ascending or horizontal, expanded from the base and be- 

 coming ear-shaped, fan-shaped, or almost circular, glabrous, 

 more or less downy towards the base ; gills radiating, very 

 narrow, rather crowded. 



Agaricus (Pleurotus) porrigens, Cke., Hdbk., p. 109 ; Cke., 

 Illustr., pi. 259A. 



Agaricus porrigens, Persoon, Obs. Myc., i. p. 54. 



On old pine trunks. 



Usually imbricated. Resembling P. petaloides in habit, 

 tut differing in colour, and in the absence of a narrowed 

 stem-like base. 



Pleurotus septicus. Fr. 



Pileus up to -3- in. across, flesh rather thick ; downy, resu- 

 pinate at first and closely applied to the wood on which it 

 grows, furnished with a minute, downy stem 12 lines long, 

 which soon disappears, leaving the pileus reflexed, and 

 apparently sessile, shining white; gills radiating from the 

 point of attachment of the stem, rather distant and broad, 

 white ; spores broadly elliptical with an oblique basal 

 apiculus, 8-10 and 6 /u,. 



Pleurotus septicus, Fries, Syst. Myc., i. p. 192; Cke., Hdbk., 

 p. 109 ; Cke., Illustr., pi. 259. 



