262 



Mycologia 



margin straight, appressed in young stages ; lamellae slightly de- 

 current, or adnate with a decurrent tooth, inserted, somewhat ven- 

 tricose, of medium distance, rather uneven on the edges, becoming 

 purplish-brown, not variegated ; spores pear-shaped, tapering grad- 

 ually at one end and abruptly at the other, smooth, pale-smoky- 

 purplish-brown under the microscope, about 7 x 3.5-4.5^; stipe 

 curved, equal, decidedly cartilaginous, glabrous, fibrillose toward 

 the base, chestnut-colored, about 3.5 cm. long and 1.5 mm. thick. 



Type locality : New York Botanical Garden, New York City, 

 Habitat : In an old chestnut stump, growing on rotten wood and 

 humus. 



Distribution : Known only from the type locality. 



This interesting little species was found by me on August 29, 

 191 1. It is characterized by a prominent nipple-like umbo and 

 pear-shaped spores, which are purplish-black in mass. The affini- 

 ties of the species are with Atylospora; but the lamellae are quite 

 decurrent, and this character is seen to good advantage even in 

 dried specimens. 



8. Deconica subviscida Peck, Ann. Rep. N. Y. State Mus. 41 : 



70. 1888 



Pileus thin, at first subconic, then convex or nearly plane, often 

 slightly umbonate, gregarious, 6-12 mm. broad; surface glabrous, 

 hygrophanous, pale-chestnut or reddish-tan-colored, subviscid and 

 striatulate on the margin when moist, pallid or dull -buff when 

 dry; lamellae broad, subdistant, adnate or slightly decurrent, at 

 first whitish or dingy, then brownish-ferruginous ; spores ellipsoid 

 or ovoid, smooth, pale-ochraceous under the microscope, 7x5^; 

 stipe equal or tapering downward, fibrillose, hollow, brownish to- 

 ward the base, paler above, the fibrils whitish or grayish, 2.5 cm. 

 long, 2 mm. thick ; veil slight, white, evanescent. 



Type locality : Menands, New York. 



Habitat : On horse manure and manured ground. 



Distribution : New York and Michigan. 



Peck collected the type specimens in August. He says it appears 

 in wet weather in great abundance and in successive crops. Kauff- 

 man reports it from Michigan, growing in the open on manure and 

 in the woods on moss. Both Peck and KaufTman consider it very 

 nearly related to D. bullae ea, which is true if the general appear- 



