226 rUNGUS-FLOEA. 



or with tawny fibrils below. Eing median, fugacious, often 

 quite obliterated. Pileus flesby, but becoming very thin 

 towards tlie margin, convex then expanded, at length 

 gibbous, margin revolute, 5-8 in. across, moist, not viscid, 

 disc even, rufous-bay, towards the margin paler and fibril- 

 lose, cuticle torn, becoming whitish. Flesh spongy and 

 soft, elastic, white. Gills rounded and almost free, J in. 

 and more broad ; cuticle of pileus and stem torn into fibrils 

 and separable. 



On the ground in woods. 



Intermediate between A. focalls and A. rohusta. 



Armillaria robusta. A. & S. 



Pileus about 3 in. across, flesh up to 1 in. thick at the 

 centre, hard ; convex then expanded, obtuse, dry, glabrous 

 or becoming more or less broken up towards the margin, 

 rufous-bay ; gills broadly emarginate, almost free, up to 2 in. 

 wide, crowded, whitish ; stem 1-2 in. long, up to 1 in. 

 thick, base thinner, often ventricose, solid, firm, reddish- 

 white and persistently flocculoselyfibrillose below the ample, 

 distant ring, above which the stem is white and flocculose. 



Agaricus (^Armillaria) robusta, A. & S., Consp., p. 147 ; 

 Cke., Hdbk., p. 22 ; Cke., Illustr., pi. 33 (called Agaricus 

 (^Armillaria) aurantius, Schaeff".). 



In woods. 



Distinguished from A. aurantia by the deeply emarginate, 

 very broad, whitish gills, and absence of orange-tawny, 

 more or less concentrically arranged wart-like squamules on 

 the stem up to the imperfect ring ; and stem attenuated at 

 Ihe base. 



Yar. minor. Fries, Hym. Eur., p. 41 ; Cke., Hdbk., 

 p. 22 ; Cke., Illustr., pi. 80. 



Smaller than the typical form, ring and gills very narrow, 

 pileus smooth. 



On the ground. 



O' 



Armillaria aurantia. Schaeff. 



Pileus 2-3 in. across, flesh thick at the disc, becoming 



very thin towards the margin, convex then almost plane, 



obtuse, obsoletely innately squamulose, deep orange, disc 



often darker ; gills emarginate, adnexed, about 2 lines broad. 



