PLEUROTUS. 37 



o 



bottom of the free portion of the stem ; spores oLlong, 

 narrow, oblique, white tinged with purple. The whole plant 

 smells, when first gathered, strongly of tarragon. (B. ife Br.). 



Pleurotus revolutus. Kickx. 



Pileus 4-7 in. across, flesh very thick near the stem, and 

 gradually attenuated to the very thin margin, firm, dvy, 

 elastic; convex then flattened and depressed in the centre, 

 margin incurved, glabrous, ratlier shining, colour at first 

 smoky-yellow, then lead or mouse-colour, centre darkest ; stem 

 lateral, about 1 in. long, up to 1 in, thick, whitish, glabrous 

 or downy, solid ; gills decurrent, rather narrow, distinct, 

 rather crowded, white, margin minutely toothed. 



Agaricus (^Pleurotus) revolutus, Kiclvx, p. 158; Cke., Hdbk., 

 p. 105. 



On beech trunks. 



Var. anglicus, Size and habit of the typical form, but 

 differing in the margin of the pileus being only very slightly, 

 or not at all incurved, and in the gills being pallid 

 ochraceous. 



Cke., Illustr., jdI., 180. 



On trunks. 



Pleurotus salignus. Pers. 



Pileus 2-4 in. across, subdimidiate, horizontal, at length 

 depressed behind and strigose, margin entire, incurved, 

 pale yellow-brown or dusky ; stem always short, firm, more 

 or less downy ; gills horizontal, not distinctly decurrent, 

 li— 2 lines broad, distinct behind, branched at the middle, 

 crowded, pale dingy -pallid, margin often broken, not 

 glandular. 



Agaricus salignus, Pers., Svn., p. 478; Cke., Hdbk., p. 105; 

 Cke., Illustr., pi. 228. 



On rotten trunks, especially willows. 



Not caespitose. Keadily distinguished by the pileus being 

 pulvinate when young, then becoming depressed and strigose, 

 gills thinner and more crowded than usual in the genus, 

 somewhat branching, not anastomosing behind ; dingy 

 smoke-colour, as are also the spores. (Fries.) 



Pleurotus acerinus. Fr. 

 Pileus 1-4 in. acro.-s, some\vhat circular, convex or almost 



