66 fournal of Mycology [Vol. 13 



white. Lamellae narrow, close, adnate, at first whitish then 

 black; spores broadly elliptic, 13 x 8 mic. 



Growing on rotten trunks. Kansas, Bartholomew. Pileus 

 2-4 cm. in diameter; the stipe 5-8 cm. long, 2-3 mm. thick. 



8. PSATHYRELLA GRACILLIMA Peck, Bull. Torr. 

 Club, 1896, Sylloge XIV, 162. 



Pileus membranaceous, convex or nearly plane, at length 

 striatulate, pale blue, the center yellow. Stipe slender, elongated, 

 erect, hollow, whitish or cream color. Lamellae close, rounded 

 behind, adnexed or nearly free, at first dilute-testaceous, at length 

 black; spores eUiptic-oblong, 14-16 x 6-8 mic. 



Growing on wet wood. Kansas, Bar thai omczv. Pileus 2-4 

 cm. in diameter; stipe 8-13 cm. long, 1-2 mm. thick. 



9. PSATHYRELLA FRAGILIS Earle, Mycological 

 Studies I, 1902. Sylloge XVII, 94. 



Pileus thin, fragile, subconic then expanded, plicate-sulcate, 

 brown-grav l>ecoming paler, the surface minutely furfuraceous. 

 Stipe filiform, whitish and smooth above, below pale gray and 

 minutely furfuraceous. Lamellae nearly free, rather distant, at 

 first pale gray, at maturity slightly blackened, spores hyaUne, 

 dark in mass, elliptic-oblong, 8-9 x 4-5 mic. i- guttulate. 



Growing on fallen leaves of Pine. California. Pileus 4-8 

 mm. in diameter, stipe 2-3 cm. long. 



§ 2. GRACILES. Solitary or gregarious, growing on 

 damp ground in fields and woods. Stipe usually erect and straight, 

 glabrous. 



a. Lamellae broad, adnate. 



10. PSATHYRELLA GRACILIS Persoon, Synopsis, 

 1801. Cooke, Illustr., 634 (?). 



Pileus submembranaceous, conic, striatulate, livid or brown- 

 ish when wet, when dry alutaceous, pink, etc., and without striae. 

 Stipe slender, straight, naked, pallid, villous at the base. La- 

 mellae broadly adnate, subdistant. cinereous then blackish, the edge 

 rose-colored; spores elliptic, 12-14x6-8 mic. 



Growing along roadsides, hedgerows, etc. New York, 

 Peck; Preston. O. Pileu". 2-3 cm. in diameter; stipe 7-8 cm. 

 long, about 2 mm. thick. 



11. PSATHYRELLA GRACILIOIDES Peck, 30 N. Y. 

 Rep. 1877. 



Pileus thin, conical or campanulate. glabrous, brown and 

 striatulate when moist, when dry whitish and subrugulose. Stipe 

 long, straight, fragile, hollow, smooth, white. Lamellae rather 

 broad, subdistant. brown, becomang blackish-brown, the edge 

 whitish; spores elliptic, 15-16 x 7-8 mic. 



