PLEUROTUS. 381 



Pleurotus cyphellaeformis. Berk. 



Pilous up to -J in. broad and high, rather fleshy, sessile, 

 cup-shaped, more or less pendulous, upper layer gelatinous, 

 grey, margin paler, sprinkled with a few meal-like scales, 

 very minutely downy, especially at the base ; gills narrow, 

 distant, pure white. 



Aijaricus (Pleurotus) cyphellaeformis, Berk., Mag. Zool. and 

 Bot., i. t. 15, f. 3; Cke., Hdbk., p. 110; Cke., Illustr., pi. 

 244B. 



On dead stems of herbaceous plants. 



Gregarius ; resembling a Cyphella in habit. 



Pleurotus applicatus. Batsch. 



Up to in. across, cup-shaped and orbicular when young, 

 usually sessile and fixed by the downy base, rarely fur- 

 nished with a very short, rudimentary stem; gills radi- 

 ating from a central point; when adult more or less re- 

 flexed, but never truly dimidiate, slightly pruinose when 

 young, glabrous or downy, minutely striate when moist ; 

 colour variable blackish-blue, dark or ashy-grey ; gills 

 scanty, rather thick, broad, distant, paler than the pileus, 

 and margin usually whitish. 



Agartcus applicatus, Batsch, f. 125; Cke., Hdbk., p. Ill ; 

 Cke., Illustr., pi. 224c. 



On rotten wood. 



Distinguished among the minute species by its dingy 

 colour. Somewhat resembling P. tremulus, but known by 

 the absence of a distinct stem. 



Pileus 2-4 lines broad, when young cup-shaped, resupinate, 

 slightly fleshy, striate when moist, more or less villous. 

 Gills broad distant radiating, grey, the margin whitish. 

 Stem none. (Berk.) 



*** Pileus membranaceous, not viscid. 



Pleurotus Hobsoni. Berk. 



Pileus 2-1 lines across, thin and delicate, reniform or 

 semicircular, horizontal, plane, pale grey, minutely downy ; 

 gills rather distant, radiating from the point of attachment 

 of the pileus, pallid. 



