84 THE CHICAGO ACADEMY OF SCIENCES 



Lamellae adnate, close, pale-yellow becoming ferruginous. 



Stem slender, hollow, equal or tapering downwards, yellowish, 

 generally becoming brownish toward the base. 



Pileus 2.5 to 5 cm. broad; stem 2.5 to 7.5 cm. long, 4 mm. 

 thick. Spores ellipsoid, dark ferruginous, 7.5 x 4 to 5 /x. 



Gregarious in a lawn. Wheaton. In open woods. Glen 

 Ellyn. September and October. 



NAUCORIA. 



Veil none or fugacious, squamulose; stem cartilaginous, fistu- 

 lose or spongy-stuffed ; pileus more or less fleshy, convex-plane 01 

 conical, the margin at first inflexed; lamellae adnate or free, not 

 decurrent. Growing on the ground, somewhat rooted. Spores 

 ferruginous. 



Pileus not hygrophanous N. semiorbicularis. 



Pileus hygrophanous N. vernalis. 



Naucoria semiorbicularis Fr. 



Pileus a little fleshy, hemispheric, expanded, even, glabrous, 

 somewhat viscid, at length rivulose. 



Lamellae adnate, very broad, close, pallid then ferruginous. 



Stem slender, tough, almost straight, pale-ferruginous, shining 

 with a free tubular pith. 



Pileus 2.5 to 5 cm. broad; stem 7.5 to 10 cm. long, 2 mm. 

 thick. 



Peaty ground in a partially drained slough, Palos Park 

 May. Our plants are slightly viscid when young, becoming dry 

 The color of the pileus in mature plants is ochraceous-tan, of the 

 stem whitish. Spores pyriform or ellipsoid, 11 to 13 x 6 to 8 /x 



Naucoria vernalis Pk. 



Pileus thin, fleshy, convex then a little depressed with a de- 

 flexed margin, umbonate, hygrophanous, dull-yellow, darker wher 

 moist. 



Lamellae narrow, attached, cinnamon-color. 



Stem long, flexuous, striate-sulcate, hollow, tapering down 

 ward, white-villous at the base, brownish. 



Pileus 2 to 3 cm. broad; stem 4 to 8 cm. high, 4 to 5 mm 

 thick. Spores wood-brown. 



Growing out of holes in the bark of rotten logs of Quercus 

 The plants are rooted in the rotten wood underneath the bark 

 so that the pileus often appears nearly sessile on the surface o 

 the log. Often cespitose. Our plants are only occasionally 

 umbonate. The stem is striate beneath a mealy coating. Tast< 

 farinaceous then bitter. Spores pale-brown, ellipsoidal, inequilat 

 eral, often with one side flat, 7 to 8 x 5 /x. After rains, spring t( 

 autumn. 



