42 Natural History Bulletin. 



pering upward. Lamellae not decurrent, only uncinate by a 

 tooth Fungi epiphytal or rooting. — Morgan, 



iS. Agaricus galericulatus. — Scof. 



Pileus conic, campanulate, umbonate, striate nearly to the 

 summit, smooth, generally some shade of brown; lamellae 

 white, decurrent-toothed, connected above by vein-like ridges; 

 stipe smooth, shining, slender, rooting. 



Height 2 '-4'. Pileus Y^' -yi' - July-November. 



Exxeedingly common on old stumps, rotten logs and the 

 like in shady places. Often csespitose, variable in size and 

 color; the gills sometimes with a reddish tinge. 

 Collected sometimes in midwinter. 



19. Agaricus purus. — Pe^'s. 



Pileus, convex or campanulate, smooth purple or lilac, 

 somewhat h3^grophanous and evidently paler when dry; la- 

 mellae pale, often pure white, broad, distant, connected by 

 veins, rounded within and slightly attached; stipe smooth 

 rigid even, white, villous at base. 



Height 3 '-4'. Pileus about i'. September. 



A beautiful agaric, quite common amongst leaves in moist 

 ravines. Generally gregarious and with strong odor. Au- 

 thorities give the lamellae as concolorous though paler. Our 

 specimens have the gills oftenest purest white, rarely with a 

 bluish cast as if tinted from the royal purple pileus. 



Subgenus Omphalia. 



Lamellae decurrent. Stipe cartilaginous and tapering up- 

 ward until it blends with the pileus which is thin or membra- 

 naceous and depressed or umbilicate. 



20. Agaricus umbelliferus. — L. 



Pileus thin somewhat fleshy, radiate striate when fresh, 

 margin at first inflexed, crenate, or wavy, white or yellowish. 

 Lamellae broad distant decidedly decurrent. Stipe short, 

 slightly pubescent at base, concolorous. 



