PSATHYBA. 359 



Stem hollow, 2-3 in. long, 2-3 lines thick, rather firm for 

 the present genus, soon glabrous, white, base white and 

 Tillose, apex striate and powdered with white meal. Pileus 

 submembranaceous ; at first ovate, then campanulate, at 

 length expanded, obtuse, 2-3 in. broad, when young every- 

 where fibrillose and brownish clay-colour, when dry 

 ochraceous clay-colour, when adult glabrous, rugulose, 

 whitish clay-colour, margin slightly undulate, sometimes 

 with fragments of the veil attached. Gills adnate, l|-2 

 lines broad, crowded, white, then brown, edge similarly 

 coloured. Approaching to Hypholoma appendiculatus, but 

 not growing on trunks. (Fries.) 



Psathyra fibrillosa* Pers. 



Pileus 1-1^ in. across, submembranaceous, campanulato- 

 convex, then expanded, and almost plane, minutely striate, 

 at first fibrUlose, livid then whitish; gills adnate, plane, 

 broad behind, blackish-purple ; stem about 2 in. long, 

 2 lines thick, equal, very fragile, fibrilloso-squamulose, 

 white, often incurved at the base, hollow ; spores blackish- 

 purple. 



Agariciis fhrillosus, Pers., p. 424; Cke., Hdbk., p. 216; 

 Cke., Illustr., pi. 595 b. 



On the ground or on rotten branches, in woods, &c. 



Very variable in form and perhaps embracing two species, 

 always solitary. Typical form very fragile. Stem hollow, 

 3—4 in. long, 2-3 lines thick, equal, everywhere covered 

 with spreading fibrilloso-fasciculate squamules, white. Pileus 

 submembranaceous, from campanulate to convex, then 

 expanded, obtuse, livid or whitish, striate from the giUs 

 showing through the translucent pileus, commonly glabrous, 

 sometimes at first squamulose, 1 in. and more across. Gills 

 adnate, broadest behind, 3-5 lines broad, at length plane, 

 grey, then blackish-purple. (Fries.) 



Psathyra Gordoni. B. & Br. 

 Densely tufted. Pileus 1-lf in. across, membranaceous, 

 campanulate, pale grey, then white, sprinkled with white 

 floccose scales, margin sulcato-striate ; gills ascending, 

 narrowly adnate, distant, rather broad, scarcely ventricose, 

 grey; stem about 2 in. high, 1| line thick, transversely 



