Agaricaceae 



(Plate CX.) 



PsathyreUa. P. graciloi'des Pk. slender. Pileus thin, conical or bell-shaped, 



glabrous, hygrophanous, brown and striatu- 

 late when moist, whitish and subrugulose 

 when dry. Lamellae ascending, rather 

 broad, subdistant, brown, becoming black- 

 ish-brown, the edge whitish. Stem long, 

 straight, fragile, hollow, smooth, white. 

 Spores blackish, elliptical, 15-16.5x8- 



8.5*. 



Plant gregarious, 4-6 in. high. Pileus 

 I in. broad. Stem I line thick. 



Ground in an old dooryard. Maryland. 

 September. 



This is allied to A. gracilis Fr., but the 

 edge of the gills is not rosy. When dry- 

 ing the moisture leaves the disk of the pi- 

 leus first, the margin last. When dry the 

 plant bears some resemblance to large forms 

 of A. tener. Under a lens the texture of 

 the surface of the pileus is seen to be com- 

 posed of matted fibrils. Peck, 3Oth Rep. 

 N. Y. State Bot. 



Pennsylvania and New Jersey, on ground 

 about houses and stables, often in barn 

 yards, after they have been cleaned out 

 and are empty for the summer. Mcllvaine. 



The whitish-edged gills with entire absence of rosiness on gill edges 

 distinguish this species from P. gracilis Fr. It is frequent but not 

 plentiful. Often a pint can be gathered. It has a fine mushroom flavor, 

 resembling the delicate forms of Coprinus. 



P. atoma'ta Fr. atomatus, atomate. Pileus ^-i in. broad, livid, 

 when dry becoming pale tan or pale flesh-color, sometimes reddish, hy- 

 grophanous, membranaceous, bell-shaped, obtuse, slightly striate, when 

 dry without striae, slightly wrinkled, sprinkled with shining atoms. 

 Stem 2 in. long, almost I line thick, tubular, equal, not rooted, lax, 

 slightly bent (not tense and straight), white and white pulverulent at 



PSATHYRELLA GRACILOIDES. 



39C 



