July 1907] North Americayi Species of Agaricaceae 149 



9. PSATHYRA FLAVOGRISEA Berkeley, Ann. N. 

 H. 1845. 



Pileus membranaceous, conic-campanulate, at first tawny- 

 alutaceous, at length the margin sulcate and gray. Stipe slender, 

 flexuous, white, fistulous. Lamellae alutaceous becoming purple, 

 distant, ventricose, adnexed ; spores elliptic, purple-brown. 



Growing among dead leaves, Nebraska, Clements. Pileus 

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

 related to Ps. gyroflexa. 



10. PSATHYRA FAGICOLA Lasch, Linnaea III, 1828. 



Pileus membranaceous, campanulate, obtuse, striatulate, vis- 

 cid, bluish to brownish. Stipe equal, fragile, fibrillose, fur- 

 furaceous, becoming pallid. Lamellae adnexed, seceding, subli- 

 quescent, brown; spores brown. 



Subcaespitose ; growing on trunks of Beech trees. N, Car- 

 olina, Curtis. Pileus 3-5 cm. in diameter; stipe 5-6 cm. long, 

 4-6 mm. thick, 



11. PSATHYRA EPIBATES Fries, Novae Symb. Myc. 

 1851. 



Pileus membranaceous, rather tough, parabolic, glabrous, 

 egg-yellow, striate around the margin. Stipe fistulose, almost 

 capillary, smooth, glabrous, egg-yellow, arising from an orbicular 

 base. Lamellae ascending, brown. 



Growing on rotten wood at Naranjo, Costa Rica, Oersted, 

 Ic. 10. Pileus parabolic (taller than broad) 4-6 mm; stipe 

 about 2 cm. long. The base of the stipe resembles that of My- 

 cena stylobates. 



12. PSATHYRA SILVATICA Peck, 42 N. Y. Rep. 



Pileus membranaceous, campanulate, glabrous, viscid, hy- 

 grophanous, dark brown and striatulate when moist, grayish- 

 brown when dry. Stipe slender, fistulous, subflexuous, brown. 

 Lamellae broad, ascending, subdistant, feruginous-brown with a 

 white edge ; spores brown, 10 x 6 mic. 



Growing on mossy ground in woods. New York, Peck. 

 Pileus 8-10 mm. in diameter; stipe 3-5 cm. long, i mm. thick. 



13. PSATHYRA UMBONATA Peck, 50 N. Y, Rep. 



Pileus submembranaceous, campanulate, umbonate, hygro- 

 phanous. purplish-brown and striatulate when moist, grayish- 

 white when dry, atomate. Stipe slender, flexuous, hollow, white, 

 slightly mealy at the summit, tomentose at the base. Lamellae 



