July 1907] North American Species of Agaricaceae 143 



NORTH AMERICAN SPECIES OF AGARICACEAE. 



A. P, MORGAN. 



THE MELANOSPORAE. (Continued.) 

 {Continued from page 62.) 

 III. DECONICA W. Smith, Journal of Botany, 1870. 



Pileus fleshy, thin, convex then expanded, the surface smooth 

 and glabrous, the margin at first incurved. Stipe suh cartilaginous, 

 fistulous, smooth or fibrillose. Lamellae very broad, adnate, or 

 subdecurrent, becoming purple or brozim; spores purphsh-brown 

 or purplish-black. 



This genus is intended to correspond to Omphalia in the 

 Leucosporae ; it is a subsection of Psilocybe in the arrangement 

 of Fries. 



I. COPROPHILAE. Growing on munure or in rich soil 

 in fields, pastures, etc. 



a. Pileus smooth, not striatulate. 



1. DECONICA COPROPHILA Bulliard, Herb. Fr. 

 1791. Cooke, Illustr. 608. 



Pileus fleshy, hemispheric then expanded, umbonate, smooth 

 and glabrous, alutaceous, rufescent. 



Stipe tapering upward, fistulous, pruinose at the apex, glab- 

 rate. Lamellae arcuate-subdecurrent, broad, livid-brown ; spores 

 13-14x8 mic. 



Growing on dung heaps and in pastures. Probably common 

 everywhere. Pileus 2-4 cm. in diameter ; stipe 5-8 cm. long, 2-3 

 mm. thick. Stipe at first short and flocculose, becoming elong- 

 ated, glabrous and shining. 



2. DECONICA DIGRESS A, Panaeolus digressus Peck, 

 Bull. Torr. Club, 1895. Sylloge XIV, 161. 



Pileus hemispheric or convex, glabrous, red-brown. Stipe 

 short, fistulous, striate at the apex, toward the base floccose- 

 fibrillose, paler than the pileus. Lamellae very broad, distant, 

 adnate, purple-black, the edge whitish; spores broadly elliptic, 

 13-15x9-10 mic. 



Growing on manure. California, McClatchie. Pileus 1-1.5 

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



