The Mycologic Flora of the Miami Valley, 0. 117 



the apex. Lamella adnate, broad, variegated with gray and sooty. 

 Spores black. 



On dung and on manured land, in spring and summer. Pileus 1-2 

 in. broad, stipe 2 4 in. long. Pileus when moist commonly sooty- 

 canescent, when dry argillaceous-canescent. 



Subgenus XXX. — Psathyrella. 

 Pileus membranaceous, striate, the margin not exceeding the 

 lamellse. Lamelloe uniformly black-sootj-, not variegated. 



a. Stipe straight, glabrous. 



144. A. GRACILIS, Fr. — Pileus somewhat membranaceous, conic, 

 striatulate, hygrophanous, when dr}^ not striate. Stipe slender, 

 straight, naked, pallid. Lamellae broadly adnate, rather distant, cin- 

 ereous-blackish; the edge obsoletely rose-color. Spores black, elliptic, 

 very large, .014n>^.008 mm. 



In low grounds along fence-rows. Pileus f-H in. broad, stipe 3-5 

 in. high. Pileus at first livid or brownish, then changing to ochra- 

 ceous, alutaceous, pinkish or whitish. 



b. Stipe Jlexuous, pruinate at the apex. 



145. A. ATOMATUS, Fr. — Pileus somewhat membranaceous, campanu- 

 late, obtuse, striatulate, hygrophanous, when dry rugulose, entire, 

 furfuraceous with shining atoms. Stipe lax, fragile, white; the apex 

 white-furfuraceous. Lamellae adnate, broad, cinereous-blackish. Spores 

 black, elliptic, large .OHX.008 mm. 



Among chips and rotten wood in woods. Pileus ^-1 in. in diameter, 

 stipe 2-3 in. long. Pileus at length piano-expanded, ochraceous in- 

 clining to pale reddish, at length cream-colored or nearlj' white. Stipe 

 somewhat rooting, more or less cottony at the base. 



146. A. DissEMiNATUs, Pers. — Pileus membranaceous, ovate campanu- 

 late, furfuraceous, afterward naked, sulcate-plicate, entire, changing 

 color. Stipe lax, somewhat flexuous, fragile, furfuraceous then 

 glabrous. Lamellae adnate, broadly linear, white-cinereous, then chang- 

 ing to black. Spores black, elliptic, .0076X-0051 mm. 



About trunks of trees and on the ground, in woods. Gregarious and 

 caespitose, sometimes in countless numbers. A very small Agaric ; 

 pileus about one fourth of an inch in breadth, the stipe about 1 inch 

 long. Pileus yellowish or ochraceous, at length cinereous or whitish, 

 sometimes with a pearly- tint toward the margin. 



[to be CONTINUED.] 



