62 TWENIT-FOURTH RePORI ON THE StATE MuSEUIf. 



lamellae narrow, close, white, free; stem equal, firm, hollow, 

 tomeiitose-fibrillose, brownish-tawny ; spores subelliptical, 5 oVo' 

 long. 



Plant csespitose, 1.5'-2^ ^igh, pilens 6"-12" broad, stem 1'' thick. 



Base of an elm tree. Albany. August. 



Allied to A. stipitarius, but a much larger plant with a differ- 

 ent mode of growth. Under a lens the pileus is seen to be clothed 

 with rather coarse, densely matted, subfasciculate, prostrate, tawny 

 hairs. In the dried specimens the darker zones are less clear, and 

 the pileus has become concentrically sulcate. A minute umbo or 

 papilla is seen in the umbilicus in some specimens. 



Agaricus clusilis J^r. 



Burnt ground in woods. Greig. September. 



Agaricus (Collybia) spinijlifer n. sp. ~ ' 



Pileus fleshy, thin, convex, smooth, hygrophanous, alutaceous 

 tinged with pink and slightly striatulate on the margin when 

 moist, paler when dry ; lamellae narrow, close, rounded behind and 

 free, pale cinnamon colored ; stem slender, tough, smooth, shining, 

 hollow, reddish-brown, paler above, with a whitish mycelium at 

 the base ; spores subelliptical, ^^Vtt^ long. 



Plant caespitose, 2^-3' high, pileus 1^-1.5^ broad, stem V thick. 



Old logs and ground among leaves in woods. Greig. Septem- 

 ber. (Plate 1, figs. 4-9.) 



The lamellae are clothed with minute spines or setae, of a dull 

 cinnamon color, about ^woV lo^^S^? thickest near the base and 

 gradually tapering to the point. These give to the lamellae their 

 peculiar hue. In young plants the stem is whitish nearly to the 

 base. 



Agaricus (Collybia) simillimus n. sp. 



Size and habit exactly as in the preceding species for which it is 

 liable to be mistaken. The pileus becomes lighter colored (almost 

 white) in drying, the lamellae are white, attached to the stem and 

 destitute of the spine-like processes which form such a remarkable 

 feature in its near ally, and the stem is of a uniform reddish- 

 brown color. 



Greig. September. 



Agaricus Leaianus Berk. 



Decaying beech logs and branches in woods. Buffalo. Clinton. 

 Sandlake, Helderberg and Adirondack mountains. July, Septem- 

 ber. 



An extremely beautiful plant when young and fresh, but it loses 

 its color in drying. It grows in dense tufts, and when young, 



