Jan. 1907] North American Species of Lepiota 9 



78. LEPIOTA AMERICANA Peck, 49 N. Y. Rep. 1895 ; 

 Agaricus americanus Peck, 23 N. Y. Rep, 1870. 



Pileus fleshy, ovoid then campanulate and expanded, um- 

 bonate; the flesh thin, white, reddening when cut or broken; the 

 dermis radiately fibrillose beneath the cuticle and at first white; 

 the cuticle brick-color or bay-brown, at first continuous, soon 

 breaking up except upon the umbo into small scales, which are 

 gradually drawn apart and scattered over the surface. Stipe 

 tapering upward from a base m.ore or less thickened and elon- 

 gated, fistulous, smooth and glabrous, white, reddening when 

 handled ; ' the annulus thin, membranaceous. Lamellae rather 

 narrow, close, free, white; the spores subelliptic, 8-10x5-7 mic. 

 uniguttulate. 



Solitary or subcaespitose ; growing in rich soil in grassy 

 grounds or around old stumps, Eastern U. S. west to Michigan 

 and Ohio, south to Alabama. Pileus 5-10 cm. in diameter; the 

 stipe 8-12 cm. in length, 4-6 mm. thick at the apex, 8-12 mm, 

 thick at the swollen base. When young and growing the whole 

 plant except the epidermis of the pileus is white, but when 

 handled or in drying it assumes a dull reddish or smoky-red 

 color. It is quite probable that Agaricus Badhami B. & Br, 

 catalogued by Sprague. Proc. Soc. N. H|., Boston, 1859, was 

 based upon specimens of this plant. 



79. LEPIOTA CALOCEPS Atkinson, Journal My- 

 cology, 1902. 



Pileus fleshy, ovoid then convex and expanded ; the flesh 

 thick, firm, white ; the dermis with a brownish or tawny-oliva- 

 ceous cuticle, at first continuous, at length cracking and separat- 

 ing into rectan.f^ular or nearly square areas. Stipe arising from 

 a bulbous base, fistulous, white above, dull flesh-color below, 

 covered up to the annulus by angular patches of the dermis simi- 

 lar to those on the pileus. Lamellae rather narrow, close, free, 

 dingy white ; spores elliptic-oblong, obliquely apiculate, 6-8 x 

 ■2.5-3.0 mic. 



Gregarious ; growing on the ground in woods. New York, 

 Atkinson. Pileus 4-8 cm. in diameter, the stipe 6-10 cm. in 

 height and 6-10 mm. thick. It is possible this species belongs 

 more properly in the Clypeolariae. 



80. LEPIOTA EXCORIATA, A'garicus excoriatus 

 Schaeffer, Index, 1774; Icones Tab. 18 et 19; Cooke, Illustr, 

 Pl. 23 ; Bresadola, Fung. Mang. Tav. 14. 



Pileus fleshy, ovoid then convex and expanded, subumbo- 

 nate ; the flesh thick, soft, white, impressd around the apex of 

 the stipe ; the dermis white-fibrillose beneath the cuticle ; the cuti- 

 cle thin, firm, whitish or sometimes dusky in the center, splitting 



