i82 Natural History Bulletin. 



Subgenus Atnanita. 

 2^. Agaricus virosus, J^?'. 



Pileus conic-convex, then expanded, viscid, white, margin 

 sub-lobate, repand, smooth; stipe stuffed, stout, rising from a 

 bulbous base, more or less squamous all the way up to the 

 broad, dependent annulus; lamellee free, linear-lanceolate. 



Height about 8'. Pileus 6'. , September. 



Spores spheroidal, .007-.008 mm. 



Rare in damp woods. Reputed poisonous. 



The whole plant is snow-white, and very stout and robust- 

 looking; beautiful but ill-odorous. I have met with it but 

 twice, but have no doubt of the identity of the species, as it 

 agrees perfectly with Fries' description (as above) and with 

 plate I in Cooke's Illustrations. 



4=*. Agaricus pantherinus, DC. 



Pileus convex-expanded, at length perfectly flat, viscid, margin 

 striate, flesh white; stipe stuffed, at length hollow, the en- 

 larged base sheathed by the blunt-edged volva; lamellae atten- 

 uate, free; annulus distinct and persistent, about half way up 

 the slender stipe. 



Height 4 '-6'. Pileus 2 '-4'. 



Spores .007 X .005. mm. 



This species is also quite rare in our region; occurs in June 

 and July in unfrequented woodlands. The color is described 

 as variable, but never red or yellow. Ours are pure white, 

 sometimes a little dusky about the disk, never so deeply tinted 

 (not anything like it) as in Cooke's plate, although in other 

 particulars closely correspondent. 



Stibgemis Pleurotus. 

 22**. Agaricus ulmarius, Bull. 



Pileus plano-convex, solid, fleshy, smooth, cream-white, 

 sometimes flecked with darker tints; stipe sub-excentric, 

 thickened downward, more or less tomentose at base, very 

 stout; lamellee adnate, crowded, broad and white. 



