March 1907] North American Species of Agaricaccae 59 



11. PAN AEOLUS Fries, Epicrisis, 1836. 



Pileiis somewhat fleshy, convex or campanulate, without 

 striae; a marginal veil sometimes present. Stipe commonly fis- 

 tulous, rather firm, subglabrous. Lamellae adnexed or adnate, 

 cinereous and black variegated; spores subelHptic, usually large, 

 black in mass. 



Growing nearly always on manure or on richly manured 

 soil. Corresponding more closely to Hypholoma in the purple 

 spored series. 



§ I. CAMPANULATL Pileus dry, not viscid, the surface 

 smooth and shining; veil extremely fugacious or quite obsolete. 



a. Stipe fistulous, stuffed or hollozv. 



1. PAN AEOLUS FIMICOLA Persoon, Synopsis, 1801. 

 Cooke, Illustr., 632. 



Pileus fleshy, campanulate then convex, obtuse, glabrous 

 opaque, sooty-gray, clay-color when dry, around the margin 

 marked by a narrow brown zone. Stipe fragile, elongated, equal, 

 pallid, white-pruinate at the apex. Lamellae broad, adnate, gray 

 and sooty variegated; spores elliptic, 16x8-10 mic. 



Growing on manure in pastures. Recorded in various parts 

 of the country. Pileus 2-3 cm. in diameter; stipe 7-10 cm, long, 

 2-3 mm. thick. 



2. PANAEOLUS ACUMINATUS Schaeffer, Index, 

 1774- 



Pileus fleshy, conical acutely umbonate, smooth, glabrous, 

 shining, carneo-alutaceous, zonate around the margin by a dark 

 band. Stipe tapering upward from a thickened base, usually 

 short, pruinose, whitish, brown below. Lamellae rather narrow, 

 close, adnexed, becoming black; spores 



Growing in rich soil and on manure. Preston, O. Pileus 

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



3. PANAEOLUS PAPILIONACEUS Bulliard, Herb. 

 Fr., 1 781. 



Pileus fleshy, hemispheric, glabrous, pallid, when dry rimose 

 scaly. Stipe equal, smooth, whitish, white-pulverulent at the 

 apex. Lamellae very broad, adnate at length plane, becoming 

 black ; spores 15-18 x 7-8 mic. 



Growing on manure and manured earth in fields and woods. 

 Common everywhere. Pileus 2-3 cm. in diameter; stipe 6-8 cm. 

 long, 2-3 mm. thick. 



