346 OUTLINES OF BRITISH FUNGOLOGV 



Tribe 4. Pleukopus. — tStem excentric or lateral ; ijrowbuj on 

 trimhs. 



5G. L. obliquus, Fr. ; white, turning yellowish ; pileus 

 fleshy, thin, i)laiio-depressed, oblique, zoned with grey, 

 lobate, silky ; stem stuffed, then hollow, rather excentric, 

 curved ; gills crowded, white. 



On trunks, etc. 



10. RUSSULA, Fr. (p. 209.) 



1. Compacts. — Pileus fleshy throufjhout^ margin at Jirst bent 

 imcards, ivithout strice, tuithout a distinct viscous pellicle, colour 

 not variable, 07ily changing with age ; Jiesh compact, firm ; 

 stem solid, fleshy ; gills unequal. 



1. R. nigricans, Fr. ; .2-4 in. Eppiug Forest. 



2. R. adusta, Fr. (p. 209). 



3. R. albo-nigra, Kromb. ; pileus fleshy, convexo-plane 

 depressed in centre, at length iufundibuiiform, viscid, 

 whitish, smoky at margin ; flesh white, becoming blackish 

 when broken ; stem solid, stout, fuscous, then blackish ; 

 gills decurrent, crowded, unequal, dusky, whitish. 



In grassy places. Kew. Epping Forest. Probably a 

 variety of R. nigricans. 



4. R. densifolia, Seer. ; pileus fleshy, compact, convex, 

 then depressed, margin inflexed, smooth, not striate, 

 whitish, becoming fuliginous, grey or brownish, blackened 

 in centre ; flesh white, reddish on exposure to air, at 

 length black ; stem short, cylindrical, smooth, slightly 

 pruinose, whitish, then grey, at length blackish; gills adnato- 

 decurrent, unequal, thin, white or rosy. 



On the around. 



