110 FUNGUS-FLOE A. 



In pine woods on the ground, on pine leaves, &c. ; always 

 scattered, never caespitose, entirely white. A. Stem fistulose, 

 3 in. long, equal, almost filiform, flexile, even, glabrous, base 

 fibrillosely rooting; pileus membranaceous, campanulate, 

 somewhat umbonate, ^ in. and more across, striate when 

 moist, even when dry; gills adnate, ascending, crowded, 

 narrow, distinct, alternate ; among grass and moss in pine 

 woods. B. Stem 1 in. and more, flaccid, base downy ; pileus 

 thin, papillate, indistinctly striate, even when dry, 3-5 lines 

 broad; gills scarcely | line broad; abundantly on pine 

 leaves. C. Entirely milk-white, base minutely bulbous, 

 coarsely downy ; stem not rooting, short, scarcely 1 in., 

 pulverulent; pileus convex then almost plane, somewhat 

 umbonate, striate, rugulose, glabrous, 3-5 lines broad ; gills 

 adnate, distant, rather broad, distinct. (Fries.) 



Mycena gypsea. Pr. 



Pileus ^1 in. across, membranaceous, conical then cam- 

 panulate, striate up to the not very prominent umbo, 

 remainder whitish ; gills adnate, not decurrent, very broad 

 in front, equally narrowed from the margin to the stem, the 

 short ones broadest in front, pure white, unchangeable ; 

 stem about 3 in. long, |-1 line thick, equal, very straight 

 and fragile, even, glabrous, white, base downy, but not 

 rooting ; spores 8-9 X 4 /x. 



Agaricus (Mycena) gypseus, Pries, Epicr., p. 104; Cke., 

 lUustr., pi. 952a; Cke., Hdbk., p. 370. 



On the ground among fragments of wood, and on trunks. 



Gregarious and caespitose. Distinguished from the nume- 

 rous white species of Mycena by its size, form, and especially 

 the straight, very brittle stem. Pileus .(typically hyaline- 

 white, but the umbo or sometimes every part yellowish. 

 Gills often with a slight decurrent tooth. 



Mycena luteoalba. Bolton. 

 Pileus i-l| in. across, membranaceous, acutely cam- 

 panulate, becoming expanded and umbonate, pellucidly and 

 finely striate, glabrous, pale yellow, not becoming pale ; gills 

 adnate somewhat uncinate, joined both behind at first, broad, 

 alternately long and short, distinct, clear white, margin 

 quite entire ; stem 1-2 in. long, very slender, equal, rather 



