PLEUKOTUS. 375 



narrow, crowded, often branched, typically yellow, but 

 sometimes pallid or pinkish, the margin with sooty points 

 that are a continuation of the squamules of the stem ; stem 

 lateral, solid, up to 1 in. long, otten short or almost absent, 

 thick, deformed, yellowish , with scattered sooty squamules 

 that form a crowded zone near the gills. 



Agaricus serotinus, Schrader, Abbild. d. Sohwamm, 3 ; Cke., 

 ridbk., p. 106 ; Cke., lUustr., pi. 258b. 



On trunks. 



Gregarious or imbricately caespitose, very fleshy, compact 

 when young, then softer. 



Pleurotus pulmonarius. Fr. 



Pileus about 2 in. long by 1 in. or more broad, flesh thin, 

 soft, slightly convex, obovate or reniform, glabrous, greyish 

 or tan-colour ; gills slightly decunent, narrow, simple, 

 whitish then livid ; stem lateral, round, very short, downy. 



Affaricus (Pleurotus^ pulmonarius, Syst. Myc, p. 187 ; Cke., 

 Hdbk., p. 106 ; 



On trunks. 



Solitary. Diifers from P. serotinus in the very short stem 

 and glabrous pileus. 



Var. juglandis. Fries, Monogr., i. p. 248. 



Sessile, smaller than the typical form, gregarious ; pileus 

 obovate, attenuated into a very short stem-like base, not 

 marginate behind, flaccid, glabrous, greyish-brown ; gills 

 decurrent, coloured like the pileus or paler. 



On walnut trunks. 



Pleurotus mitis. Pers. 



Pileus ^—1 in. across, flesli thin, tough, white; horizontal, 

 reniform, even, glabrous, without a viscid pellicle, whitish 

 or with a rufescent tinge ; gills adnato-deourrent, closely 

 crowded, narrow, simple, white ; stem distinctly lateral, up 

 to -^ in. long, sometimes very short, compressed and broadened 

 upwards, powdered with white squamules; spores elliptical, 

 slightly curved, 4 x 2 /x. 



Agaricus (^Pleurotus) mitis, Cke., Hdbk., p. 107; Cke., 

 lUustr., pi. 211. 



Agaricus mitis, Persoon, Syn. p. 481. 



On fallen branches of pine, larch, &c. 



