6 fouryial of Mycology [Vol. 13 



72. LEPIOTA RHODOPEPLA Morgan sp. nov. 



Pileus submembranaceous, ovoid then campanulate and ex- 

 planate, subumbonate ; the dermis radiately fibrillose, rimulose- 

 sulcate nearly to the center, beneath the cuticle whitish chang- 

 ing to rose-color ; cuticle very thin, pale-yellow, soon separating 

 into furfuraceous scales. Stipe tapering upward, fistulous, rose- 

 colored beneath the white-fibrillose cuticle; the annulus thin, 

 membranaceous, pale yellow\ Lamellae rather broad, subdistant, 

 whitish changing to pinkish, spores elliptic-oblong, 6-8 x 4-5 mic. 



Growing on the ground among weeds in cultivated fields. 

 Preston, O. Pileus 1-2 cm. in diameter, the stipe 2-3 cm. long 

 and 1-2 mm. thick. 



IX. PROCERAE. Pileus thick and fleshy, usually um- 

 honate ; the dermis floccose or fibrillose beneath the cuticle; the 

 cuticle at first smooth and continuous, at length commonly sep- 

 arating into large irregular scales zMch are more or less de- 

 ciduous. Stipe tapering upzvard front a thickened or bulbous 

 base; the annulus often thick subcoriaceous, and truly movable. 



Lepiotae of the largest size, comprising numerous species; 

 in many of these is to be found the typical "annulus mobilis." 



a. Lepiotae of the largest size; the annulus thick and easily 

 movable. 



73. LEPIOTA PORRIGENS, Agaricus porrigens Vivi- 

 ANi, Fung. It. 1834; Agaricus prominens Fries^ Hym. Eur. 

 1874. 



Pileus fleshy, ovoid then campanulate and expanded, um- 

 bonate ; the flesh thick, soft, white, deeply impressed around the 

 apex of the stipe ; the dermis white-fibrillose beneath the cuticle ; 

 the cuticle thin, drab or pale alutaceous, at length breaking up 

 into irregular scales (except upon the umbo) which are more 

 or less deciduous. Stipe very tall, tapering upward from a 

 bulbous base, fistulous, fibrous-stuffed, minutely scaly or nearly 

 glabrous, whitish or pale drab : the annulus mobile, raised to 

 the summit of the stipe. Lamellae broad, close, white becoming 

 pinkish, tapering inward, remote from the apex of the stipe ; 

 spores elliptic-oblong, obliquely apiculate, 12-16x9-10 mic. 



Solitary ; growing in rich soil along the borders of wood- 

 lands. Vermont, Morgan; New York, Peck; Wisconsin, Brozvn; 

 Preston. O. Pileus 10-18 cm. in diameter; the stipe 20-30 cm. 

 in height, the bulbous base 3-4 cm. thick, narowins: upward 

 from about 2 cm, below to 9-12 mm. at the apex. The snow- 

 white fully expanded pileus of this plant is strikingly diflferent 

 in appearance from that of the common Lepiota procera. 



