o42 FUNGUS-FLORA. 



margin sometimes rather wavy, obtuse, glabrous, disc even, 

 very closely striatulate, hygrophanous, fuliginous, apex 

 fuscous ; gills adnate, crowded, 1 line or more broad, ven- 

 tricose, thin, sooty-black; stem 3 in. long, straight or 

 slightly wavy, glabrous, 11^ lines thick, equal, whitish, 

 glabrous, pellucid, hollow. 



Agaricus (Psathyrella) trepidus, Fries, Epicr., p. 238 ; Cke., 

 Hdbk., p. 222 ; Cke., Illustr., pi. 655 A. 



In muddy marshes and damp places. Very fragile, stem 

 usually rather wavy ; pileus with closely-crowded but not 

 deep striae. 



Stem fistulose, 3 in. long, almost 1 line thick, equal, 

 straight (rarely flexuous), glabrous and naked, diaphanous, 

 hyaline. Pileus membranaceous, very fragile, campanulate, 

 obtuse, 1 in. and more across, glabrous, disc even, spadiceous, 

 the remainder densely striatulate, fuliginous. Gills aduate. 

 crowded, ventricose, very thin, smoky-black. Spores black. 

 (Fries.) 



Psathyrella hydrophora. Bull. 



Pileus 1 in. and more across, membranaceous, campanulate, 

 then expanded, the striate margin becoming upturned, 

 glabrous, disc broad, even, rufous, remainder paler; gills 

 adnate, crowded, about 1 line broad, livid, then black ; stem 

 2^3 in. high, ascending and straight from a curved base, 

 smooth, white, hollow, often beaded with minute drops of 

 water. 



Agaricus (Psathyrella) hydropJiorus, Fries, Hym. Eur., p. 

 314; Cke., Hdbk., p. 222; Cke., Illustr., pi. 655 B. 



Agaricus hydropJiorus, Bull., Champ., t. 558, f. 2. 



On the ground in gardens, &c. 



Intermediate between the present genus and Coprinus, but 

 the gills are not truly diffluent. 



Stem fragile, straight, 3 in. long, 1 line or a little more 

 in thickness, glabrous, in rainy weather beaded with 

 moisture, white, veil fugacious, at first appendiculate. Pileus 

 submembranaceous, conico-campanulate, obtuse, then ex- 

 panded and revolute, glabrous, disc even, margin striate, 

 rufescent. Gills adnate, ascending, crowded, narrow, linear, 

 livid-black, edge of the same colour. (Fries.) 



