﻿Peck : New Species of Fungi 325 



edge, tawny ; stem short, curved, generally eccentric, rarely cen- 

 tral, brownish, sometimes mealy or pulverulent ; spores broadly 

 elliptical, g-io [jl long ; 6 fx broad, commonly uninucleate. 



Pileus 4-8 mm. broad ; stem 2-4 mm. long. 



On oak rails, Michigan. January. Prof. W. J. Beal. 



The grayish tint of the pileus is due to the minute grayish floc- 

 cose squamules. Occasionally the stem is central and the pileus 

 is slightly umbilicate. 



* 



Agaricus tabularls. 



Pileus very thick, fleshy, firm, convex, deeply rimose-areolate, 

 whitish, flesh whitish, tinged with yellow, the areolae pyramidal, 

 truncate, the sides horizontally striate, their apices sometimes to- 

 mentose ; lamellae narrow, close, free, blackish-brown when ma- 

 ture ; stem short, thick, solid; spores broadly elliptical, 7.5-9/' 

 long, 6-7.5//. broad, generally containing a single large nucleus. 



Pileus 5-10 cm. broad ; stem 2.5-5 cm. long, 1.5-2.5 cm. thick. 



In clay soil by roadsides, Craig, Colorado. August. E. 

 Bethel. 



This species is remarkable for the peculiar upper surface of the 

 pileus which is broken into pyramidal areas. The sides of these 

 are marked by parallel lines in such a way that they appear as if 

 formed by small tablets placed one upon another, each successive 

 tablet being a little smaller than the one immediately preceding it. 

 Only dried and broken specimens have been seen by me and the 

 notes of the collector do not give the color of the young lamellae. 

 There is a trace of a thick annulus on the broken stem of one 

 specimen. ' 



Hypholoma ambiguum. 



Pileus thin, convex, becoming nearly plane, glabrous, subvis- 

 cid when moist, straw color inclining to pale orange, the margin 

 ■n immature plants appendiculate with the remains of the white 

 thick veil which in very young plants conceals the lamellae, but 



white; lamellae 

 brown where 



which in mature ones wholly disappears ; flesh w 



cl °se. adnexed, grayish at first, changing to dark .,.- 



Wounded, becoming blackish-brown with age ; stem slender, equal, 

 stuffed or hollow, squamose near the base, paler than the pileus ; 

 spores elliptical, 12. 5-1 5// long, 7.5 ,"■ broad. 



