204 



Mycologia 



5. Agaricus praerimosus Peck, Bull. N. Y. State Mus. 94: 30. 



1905 



Agaricus tabularis Peck, Bull. Torrey Club 25: 325. 1898; not 

 A. tabularis Fries, 1821. 



Pileus very thick, fleshy, firm, convex, 5-10 cm. broad; surface 

 deeply rimose-areolate, whitish, the areoles pyramidal, truncate, 

 their sides horizontally striate and their apices sometimes tomen- 

 tose ; context whitish, tinged with yellow ; lamellae narrow, 

 crowded, free, blackish-brown when mature; spores broadly ellip- 

 soid, generally containing a single large nucleus, 7.5-9 x 6-7.5/*; 

 stipe short, thick, solid, 2.5-5 cm - l° n g> I -5 _2 -5 cm - thick. 



Type locality : Craig, Colorado. 



Habitat : In clay soil or dumps by roadsides. 



Distribution : Colorado. 



Type collected by E. Bethel in August ; also collected on dumps, 

 etc., about Leadville by E. B. Sterling on September 18, 1901. 

 The deep clefts in the pileus are probably caused to some extent 

 by the dry air, as I have found them in other fleshy species from 

 Colorado. 



6. Agaricus pilosporus Peck, Bull. N. Y. State Mus. 94: 36. 



1905 



Agaricus sphaerosporus Peck, Bull. Torrey Club 31: 181. 1904; 

 not A. sphaerosporus Krombh. 1836. 



Pileus fleshy, firm, broadly convex, sometimes slightly depressed 

 in the center, 7-12 cm. broad; surface glabrous, whitish, the cuticle 

 sometimes rimose, and the incurved young margin occasionally 

 wavy or irregular when mature ; context white, unchanging ; lamel- 

 lae thin, crowded, rounded behind, reaching the stipe, but free from 

 it, rosy-red, becoming blackish-brown ; spores globose or nearly so, 

 7.5-8 x 6-7.5^; stipe nearly equal, thick, firm, solid, straight or 

 curved, whitish, 3-10 cm. long, 2-3 cm. thick, with a thin, white 

 veil rupturing and adhering partly to the margin of the pileus and 

 partly to the stipe, forming a slight, fringed, soon evanescent 

 annulus. 



Type locality : Denver, Colorado. 

 Habitat : In rich soil. 



Distribution : Vicinity of Denver, Colorado. 



