y6 NEW YORK STATE MUSEUM 



center when dry, the moisture escaping first from the margin, 

 shghtly silky fibrillose on the margin when young; lamellae close, 

 slightly sinuate, adnexed, whitish becoming brown or purplish 

 brown; stem equal or slightly thickened at the base, hollow, slightly 

 silky fibrillose, obscurely striate at the apex, white; spores 8-10 p- 

 long, 5-6 i>- broad. 



Pileus 2.5-5 c^'^ broad, stem 4-7 cm long, 4-6 mm thick. 



Single or gregarious. Decaying wood. Adirondack mountains. 

 June. Rare. Found but once. 



Remarkable for the persistency of the moisture in the center 

 of the pileus. This character is suggestive of the specific name 

 and separates it from allied species. It has some points of agree- 

 ment with the candolle hypholoma, H y p h o 1 o m a c a n d o 1 - 

 1 e a n u m Fr., but differs from it in its mode of growth and in 

 the color of the young lamellae. 



Hypholoma hymenocephalum Pk. 



THIN CAP HYPHOLOMA 

 N. Y. State Mus. Rep't 31, p.34 



Pileus very thin and fragile, campanulate or convex becoming 

 expanded, sometimes umbonate, hygrophanous, brown and stria- 

 tulate when moist, pallid or whitish and radiately rugulose when 

 dry, subatomate, the whitish appendiculate veil soon evanescent ; 

 lamellae thin, narrow, close, dingy white becoming purplish brown ; 

 stem slender, fragile, hollow, striate, slightly mealy at the top, 

 white; spores 8 11 long, 4 p- broad. 



Pileus 2.5-5 cm broad; stem 5-10 cm long, 2-3 mm thick. 



Gregarious. Damp ground among fallen leaves, especially under 

 shrubs or small trees. Occasional. July and August. 



The species is remarkable for its very thin and fragile pileus 

 and for its fragile striate stem. The margin of the pileus is some- 

 times deeply split, forming radiating lobes and giving a stellate 

 appearance to the cap. 



Hypholoma appendiculatum (Bull.) Fr. 



APPENDICULATE HYPHOLOMA 



Sylloge V, p. 1039 



Pileus thin, fleshy, ovoid or convex becoming expanded, glabrous, 



hygrophanous, bay brown or tawny brown when moist, ochraceous 



or pale ochraceous and rugose after the escape of the moisture ; 



