95—COLLYBIA ACERVATA. 
Pileus convex, fleshy, obtuse, glabrous, even, reddish-brown, 
hygrophanous, slightly striate when wet. Gills narrow, close, white, 
adnexed or free. Stipe rigid, slender, very smooth, reddish-brown 
below, lighter color above, white just below the pileus, white mvceloid 
at the base, the mycelium usually growing in patches on rotton leaves. 
The plant is very frequent in our woods, growing over deep 
rotten leaves. Prof. Peck states “gills darker with age.” My observ¬ 
ations are just the reverse, quite dark when young but much lighter 
when mature. He also states pileus adorned with minute colored setae, 
and Berkeley describes the pileus as velutinate. I could not detect setae 
with a lens on the pileus, though they are very evident on the gills and 
the stem, especially when young. It is probable the pileus varies in 
this respect. 
Our plant is caespitose on damp, rotten 
leaves. That it is the plant of Prof. Peck 
we are assured, as we have an alcoholic 
specimen of his collection with which it 
agrees in all respects. It is hardly the 
plant Cooke figures, differing particularly 
in the stipe never being so large, but 
Cooke, in Grevillea, throws doubt on his 
own figure. 
96—COLLYBIA ACERVATA VAR. 
lachnophylla. 
Same as previously described species 
excepting the gills are densely covered 
with minute rufous stiff setae. 
This plant has quite a history. While 
we are doubtful about the determination 
of the previous plant we would surely call 
this a variety of it, as (for a number of 
years) we indiscriminately collected it 
for the same plant until our attention was 
called to the setae on the gills. Berkeley 
many years ago described it as Collybia 
lachnophylla and Prof. Peck as Collybia 
spinulifera. Bresadola claims that the 
plant is the .same as Mycena cohaerens of 
Persoon, and that this species in Europe Fig n 
has the same setae on the gills. We SUS- Collybia acervata *var. 'lachnophylla. 
pect this is where the plant will finally (natural size.) 
rest, although it is difficult to convince ourselves that Cooke’s figure 
(Marasmius cohaerens) and Fries’ figure (Mycena cohaerens) correctly 
depict it. 
89 
