March 1907] North American Species of Agaricaceae 61 



Growing on manure. Alabama, Underivood and Earle; 

 Preston, O. Pileus never expanded, 1.5-2.5 cm. high, the stipe 

 6-9 cm, long, 2-3 mm. thick. 



8. PANAEOLUS CARBONARIUS Batsch, Elenchus 

 Fung., 1783. Agaricus retirugis Fries, Epicrisis, 1836. 

 Cooke, Illustr., 627. 



Pileus fleshy, globose then hemispheric, subumbonate, carneo- 

 alutaceous, atomate, reticulate with raised ribs ; the veil lacerate, 

 appendiculate. Stipe equal, pruinose, flesh-color changing to 

 purple. Lamellae ascending, adnexed, rather broad, cinereous 

 becoming black; spores elliptic-fusiform, 15-20 x 8-9 mic. 



Growing on manure, New England westw^ard to Ohio. 

 Pileus 2-4 cm. in diameter, the stipe 5-10 cm. long, 2-4 mm. thick, 



9. PANAEOLUS EPIMYCES Peck, N. Y. Rep. 35, 133. 

 Pileus fleshy, subglobose then convex, white silky-fibrillose ; 



the flesh soft white or whitish. Stipe short, stout, tapering up- 

 ward, striate, minutely mealy or pruinose, solid in the young 

 plant, hollow when mature, hairy or substrigose at the base. 

 Lamellae rather broad, close, adnexed, dingy white becoming 

 brown or blackish with the edge white; spores elliptic, 7-10 x 5-7 

 mic. 



Parasitic on fungi. New York, Peck; Canada, Dearness. 

 Parasitic on Coprinus atramentarius, Wisconsin, McKenna; on 

 Coprinus comatus, Helen Sherman. See article in Journal 

 Mycology, Vol II, p. 167. Pileus 2-5 cm. in diameter ; the stipe 

 1-4 cm. long, 6-10 mm. thick. 



10. PANAEOLUS ALVEOLATUS Peck. 54 N. Y. Rt.p. 

 1900. 



Pileus thin, broadly convex, glabrous, hygrophanous. pitted, 

 dark brown when moist, grayish brown when dr}^ Stipe equal, 

 slender, fistulous, glabrous, slightly pruinose at the top. pallid. 

 Lamellae broad, close, subventricose. adnexed, blackish with a 

 white edge when mature ; spores broadly elliptic, 12-14 x 8-10 mic. 



Growing on manure in woods. New York, Peck. Pileus 

 1.5-2.5 cm. in diameter; stipe 4-8 cm. long, 2-4 mm. thick. The 

 surface of the pileus is not reticulate as in P. carbonarius. but is 

 pitted with small cavities somewhat distant from each other. 



11. PANAEOLUS INTERMEDIUS Peck, Bull. Torr. 

 Club, 1895. Sylloge, XIV, 161. 



Pileus convex or campanulate, glabrous, wet or hygrophanous, 

 grayish-brown. Stipe slender, often elongated, hollow, gray- 

 brown, white-pruinose at the apex. Lamellae ascending or 

 subarcuate, subdistant, adnate, black when mature ; spores elliptic 

 oblong. 13-15 X 6-8 mic. 



