80 TWENTT-THIRD REPORT OX THE StaTE CABINET. 



Grows in dense tufts of individuals of various sizes, on old 

 logs in woods. Adirondack Mountains. August. 



The disk is clouded with brown. The plant becomes dark 

 colored in drying. 



36. AgaRICUS STIPITAEIUS Fr. 



Pileus thin, submembranaceous, convex or expanded, um- 

 bilicate, minutely scaly ; lamellae rather broad, separating 

 from the stem, white ; stipe tough, hollow, hairy-hbrillose, 

 slender. 



Height l'-2', breadth of pileus 3"- 6". 



On twigs, -etc., under trees. Knowersville and Sandlake. 

 July and August. 



Sometimes a minute papilla is visible in the center of the 

 umbilicus. In dry weather the pileus withers, appears 

 thickly coated with tawny fibrous scales, and is sometimes 

 constricted below the apex and a little striated or fur- 

 rowed. 



37. Agaeicus cirrhatus ScTium. 



Pileus thin, expanded, umbilicate or slightly depressed, 

 white or grayish, with a faint reddish tinge ; lamellae very 

 narrow, crowded, white, attached to the stem ; stipe very slen- 

 der, whitish, subflexuous, hollow, generally with little yellow- 

 ish tubers at the base. 



Height about 1', breadth of pileus l"-4". 



On decaying vegetable matter in woods and open places. 

 Common. June - September. 



38. Agaricus tuberosus Bull. 



Closely related to the preceding, having the same size and 

 color, but the pileus umbonate, and the tubers of a bay 

 or brownish color. Poughkeepsie. Gerard. Knowersville. 

 June. 



Less common than the preceding. The last three species 

 are easily preserved, and appear to be related to the Mar- 

 asmii. 



Subgenus — Mycena. 



Stem externally cartilaginous. Margin of pileus (which is 

 mostly campanulate) at first straight and pressed to the 

 stem. — BerJc. Outl. 

 The species are all small, slender, having the pileus thin, gen- 

 erally striate or stviatulate, smooth, or only clothed with a few 

 silky fibres, obtusely conical or bell-sluiped. The lamelhc are 

 seldom crowded, not strictly decurrent, but often uncinate and 



