NATURAL HISTOKY SI RVEY 17 



Lamellae distant, arcuate, strongly decurrent, white. 



Stem slender, commonly long in proportion to th< 

 the pileus, colored like or a little paler t ban the pili 

 f: Pileus 4 to 10 mm. broad; stem 2.5 to 5 cm, Ion 

 millimeter thick. Spores narrowly ellipsoid, 1 \ 2 /'. 



Mossy borders of swamps. Millers: damp mossy plac< 

 vines, Glencoe. August. 



Omphalia scyphoides Fr. 



Pileus submembranous, plane and umbilicate or funnel-fo 

 often irregular or somewhat eccentric, even, silky, white. 



Lamellae narrow, close, decurrent, white. 

 Stem short, stuffed, subvillose, white 



Spores ellipsoid, G x 4 to 5 //.. Pileus t to 8 mm. broad; stem 

 S to 16 mm. long. 



Among dead leaves and twigs in wood-. Glen Ellyn. July. 

 Pileus fragile; stem solid or stuffed, sparsely (at the base clost 

 villous. 



PLEUROTUS. 



Stem eccentric, lateral or none; epiphytal (very rarely growing 

 on the ground), irregular, fleshy or membranaceous. 

 white (violet-tinted in /'. sapidus). 



Stem eccentric 



Stem obsolete, or nearly so 



1. Lamellae adnexed, pileus dry P. ulma 



1. Lamellae adnate, pileus viscid when young. ./'. si 

 1. Lamellae decurrent 



2. Lamellae distinct at the base 



2. Lamellae anastomosing at the base . 



3. Pileus white or buff ' P. < 



o. Pileus fuliginous-cinereous P. sal 



4. Spores white P 



4. Spores lilac /' 



5. Pileus squamose, 2.5 to 10 cm. broad P. i 



5. Pileus villous, 2.5 to 5 cm. broad 



5. Pileus pruinose, 4 to 6 mm. broad 



Pleurotus ulmarius Bull. (Plate V.) 



Pileus fleshy, compact, convex or nearly pi 

 moist, sometimes tinged with reddish, yellowii 

 and marked with livid spots, becoming darker and shi 

 old; flesh pure white. 



Lamellae broad, emarginate or rounded 

 moderately close, white or whitish. 



Stem stout, solid, straight or curved, glabr. 

 wholl}' tomentose, whitish. 



Spores globose, 5 to 6 /*. Pileus i .5 to L5 cm. I 

 to 7.5 cm. long, 12 to 20 mm. thick. 



