148 Journal of Mycology [Vol. 13 



j. PSATHYRA OBTUSA, Agaricus obtusus Persoon, 

 Synopsis i8oi. Ps. obtusata Fries, Syst. Myc. 182 i. 



Pileus submembranaceous, campanulate then expanded, ob- 

 tuse, glabrous, wrinkled, hygrophanous, umber, paler when dry. 

 Stipe fistulous, equal, smooth, nearly naked, pallid, incurved at 

 the base. Lamellae adnate subdistant, subventricose, pallid then 

 umber ; spores elliptic-oblong, 7-9 x 4-6 mic. 



Simple and caespitose ; growing on old trunks. Recorded 

 in various parts of the country. Pileus 2-3 cm. in diameter ; stipe 

 5-8 cm. long, 2-4 mm. thick. It is a smaller plant than Psilocybe 

 spadicea with which it was figured by Schaeffer. 



6. PSATHYRA CONICA Peck, 54 N. Y. Rep. 1900. 



I'ileus thin conical, rarely convex, glabrous, hygrophanous, 

 dark brown, pale ochraceous when dry. Stipe slender, fistulous, 

 silky, fibrillose, brown. Lamellae very broad, close, adnate, at 

 first whitish or pallid, at length dark brown ; spores elliptic, 

 5-6 X 4 mic. 



Growing on old prostrate trunks of spruce. New York, 

 Peck. Pileus 8-12 mm. in diameter; stipe 2.5-4 cm. long, i mm. 

 thick. 



h. Margin of the pileus striate, at least zvhen wet. 



7. PSATHYRA SPADICEO-GRISEA Schaeffer, In- 

 dex, 1774. Agaricus stipatus. Flora Danica. 



Pileus submembranaceous, conic, campanulate then ex- 

 panded, subumbonate, glabrous, striate to the middle, hygro- 

 phanous, brown then gray. Stipe firm, tapering upward, shin- 

 ing, white, striate at the apex. Lamellae adnexed, rather close, 

 narrow, brown; spores 8-10 mic. long. 



Growing on and about old trunks and rotten wood. Caro- 

 lina and Pennsylvania, Schweinitz. Pileus 5-7 cm. in diameter, 

 stipe 7-9 cm. long, 3-4 mm. thick. Simple end subcaaspitose. 



8. PSATHYRA GYROFLEXA Fries, Epicrisis, 1836. 

 Cooke, Illustr. 970. 



Pileus membranaceous, conic, campanulate, striate, atomate, 

 gray, rufescent in the center, becoming pallid. Stipe slender, 

 flexuous, silky-shining, white. Lamellae narrow, close, adnexed, 

 purplish-gray; spores dark purple, 8-10x4-5 mic. 



Subcaespitose ; growing along the grassy margins of woods. 

 Cuba, Wright. Pileus 1.0-L5 cm. in diameter; stipe 4-6 cm. 

 long, about 2 mm. thick. With almost the habit of Psathyrella 

 pallescens. 



