Murrill: Dark-spored Agarics 



217 



26. Agaricus eludens Peck, Bull. N. Y. State Mus. 139: 42. 



1910 



Pileus thin, ovoid, broadly conic or subcampanulate, sometimes 

 broadly expanded, cespitose or solitary, 5-10 cm. broad; surface 

 brown when young, becoming whitish and covered with brown, 

 fibrillose squamules, smooth and brown on the disk; margin sur- 

 passing the lamellae when young ; context white, changing to red- 

 dish when wounded ; lamellae thin, crowded, narrow, free, whitish 

 becoming bright-pink, then chocolate-brown and finally black or 

 blackish-brown ; spores subglobose or ellipsoid, 5-7 x 4-5 /x ; stipe 

 firm, nearly equal or sometimes thickened at the base, often slightly 

 bulbous, fibrous, silky, white, distinctly hollow, white within, 

 changing to blood-red when wounded, then to brown or black, 

 2.5-7 cm - l° n g> 4~8 mm - thick; annulus thick, persistent, white, 

 attached near the apex of the stipe. 



Type locality : Near Trenton, New Jersey. 

 Habitat : On dumping grounds. 



Distribution : Known only from the vicinity of Trenton. 



Illustration: Bull. N. Y. State Mus. 139: pi. X, f. 6-13. 



The types were collected by E. B. Sterling on September 15, 

 1908, and he secured many more specimens on September 13, 1909. 

 These are all at Albany. I see no difference between them and the 

 type specimens of A. placomyccs, which is known to become red- 

 dish-brown when bruised and to grow abundantly in the open at 

 times. 



27. Agaricus Sterlingii Peck, Bull. Torrey Club 29 : 73. 1902 



Pileus fleshy, firm, convex or sometimes slightly depressed in the 

 center, cespitose, 5-12 cm. broad; surface slightly silky and some- 

 times with appressed spot-like scales at the center, pale-brown or 

 grayish-brown ; context dingy, white or brownish, edible ; lamellae 

 thin, crowded, free, _ pale-brown, becoming blackish-brown with 

 age ; spores broadly ellipsoid, 6-8 x 4 fx ; stipe equal or nearly so, 

 solid or stuffed, 2.5 cm. long, 8-12 mm. thick, whitish, sometimes 

 darker above the annulus, with a thick veil partly adhering to the 

 margin of the pileus and partly to the stipe. 



Type locality : New Jersey. 

 Habitat : Unknown. 



Distribution : Known only from the type locality. 



The type at Albany is marked " New Jersey, E. B. Sterling." 



