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NEW YORK STATE MUSEUM 
deeper hues and may be tinged with ferruginous in the center. The 
margin is generally adorned with pale yellow or whitish webby fibrils 
which are sometimes slightly interwoven. Usually they are appen- 
diculate to the margin of the expanded pileus, but occasionally they 
adhere in part to the stem and form a kind of evanescent annulus. 
The lamellae vary at their inner extremity, being either rounded 
behind, adnate or slightly decurrent. The plants do not inhabit 
alders alone as might be inferred from the specific name, but they 
also occur on birch and wood of other deciduous trees and on the 
ground. 
Flammula flavida Pers. 
Pale Yellow Flammula. 
Hym. Europ. 248. Syl. Fung. Vol. v. p. 820. 
Pileus fleshy, thin, broadly convex or nearly plane, glabrous, moist, 
pale yellow, flesh whitish or pale yellow, taste bitter; lamellae moder¬ 
ately close, adnate, pale or yellowish becoming ferruginous; stem 
equal, often more or less curved, hollow, fibrillose, whitish or pale 
yellow, with a white mycelium at the base; spores .0003 in. long, 
.0002 broad. 
Pileus 1 to 2 in. broad; stem 1 to 3 in. long, 1 to 3 lines thick. 
Decaying wood of various trees. Commonly in wooded or moun¬ 
tainous districts. Summer and autumn. 
Our specimens were found on wood of both coniferous and decidu¬ 
ous trees. The plants are sometimes caespitose. The pileus becomes 
more highly colored in drying. The spores are pale ferruginous 
approaching ochraceous. In Sylloge the spores of this species are 
described as pale yellowish. 
Flammula Halliana Pk. 
Hall’s Flammula. 
Mus. Rep. 23, p. 90. 
Pileus thin, hemispherical or convex, glabrous, hygrophanous, 
subferruginous with the margin obscurely striatulate when moist, 
dull yellow when dry; lamellae close, subarcuate, slightly decurrent, 
tapering to a point at the outer extremity and ceasing before reaching 
