NATURAL HISTORY SURVEY 75 



On the ground in woods, Bowmanville, Thatchers and (lien 

 Ellyn. September and October. Somewhat gregarious and 

 cespitose. Pileus 5 to 10 cm. broad, stem 2.5 to 10 cm. long. 

 The stem is often pure white downwards, usually cottony-tomen- 

 tose about the base. An intricate plexus of mycelium intermixed 

 with dead leaves, earth or twigs usually adheres to the plant 

 when it is pulled up. The spores are subelliptic in general out- 

 line, but very irregular, often apiculate at one of the angles. 



Clitopilus prunulus Scop. 



Pileus white or cinereous, fleshy, compact, convex then flat- 

 tened and at length depressed and repand or unequal, delicately 

 pruinosc; flesh thick, white. 



Lamellae deeply clecurrent, attenuated at both ends, some- 

 what distant, entire, white then flesh-color. 



Stem solid, firm, somewhat ventricose, naked, often striate, 

 white, villous at the base. 



Pileus 5 to 10 cm. broad; stem 2.5 cm. long, about 12 mm. 

 thick. 



On the ground among dead leaves in woods, Glen Ellyn. 

 August and September. Pileus 5 to 10 cm. broad, very much 

 waved or lobed, pure white, odor farinaceous. Spores flesh-color, 

 ellipsoid, bluntly pointed at one or both ends, 12 x /x. 



Clitopilus caespitosus Pk. 



Pileus at first convex, firm, regular, shining, white, then nearly 

 plane, fragile, often irregular or eccentric, glabrous but with a 

 slight silky luster, even, whitish; flesh whitish, taste mild. 



Lamellae narrow, thin, crowded, often forked, adnate or slight- 

 ly decurrent, whitish, becoming dingy or brownish-pink. 



Stems cespitose, solid, silky-fibrillose, slightly mealy a1 the 

 top, white. 



Spores 5 x 4 /x. Pileus 5 to 10 cm. broad; stem 3 to 7.5 cm. 

 long, 4 to 8 mm. thick. 



In long grass in Chicago parks. September. Dr. Watson. 



LEPTONIA. 



Stem cartilaginous, tubular (the tube hollow or stuffed), 

 polished, somewhat shining; pileus thin, umbilicate or with a 

 darker disk, cuticle fibrillose or separating into darker scales, 



margin at first incurved; lamellae at first adnexed or adnate, but 

 readily separating. The species are small and brightly colored, 

 growing in troops. Spores rosy, irregular. 



Leptonia asprella Fr. 



• Pileus hygrophanous, at first fuliginous then livid-gray, some- 

 what membranaceous, convex then flattened, the darker um- 

 bilicus villous at length squamulose marked with spots, striate, 

 sometimes (the disk excepted) smooth, sometimes fibrillose. 



