27 
incurved and connected with the stem by a loose, dirty white, cottony 
web, surface oppressed strigose-tomentose , light-drab color becoming yel¬ 
lowish. Stem 2-3 cin high, 2-3 mm thick, solid or at least with only a 
slight cavity above, indistinctly annular-marked above the middle, sur¬ 
face loosely fibrose cottony, white tomentose at base. Lamellae at¬ 
tached with a slight decurrent tooth, finally slightly depressed around 
the stem, pale at first, then dirty cinnamon, 3-4 mm wide, hardly crowded, 
margins subserrulate. Spores elliptical, slightly inequilateral, 6-8 by 
4//, dark rust color, on cUsvate-eyliudrical basidia about 27 b^y 7 ja 
with erect sporophores 3-4/^ loug. The surface of the pileus can not be 
called striate, though the loosely matted hairs all radiate from the 
center. Smell not farinaceous, rather unpleasant. 
1. subdecurrens is larger, with a hollow stem, and has the gills more 
crowded, nor is the margin incurved and tomentose, and it is also of a 
rather darker shade and has the margin of the gills more strongly 
serrate. 
In I. tomentosci the margin remains incurved till the plant is nearly 
full grown. In Z. subdeeurrens the margin is never incurved even when 
young, nor is there any annular mark on the stem though the fibrous 
veil is at first distinct. There does not seem to be any doubt that the 
two species are distinct, though their general appearance is much the 
same. 
Agaricus (hypiioloma) olivagsporus, E. & E. (N. A. F. 2009.) 
Among moss in swamps. Newfield, H. J., July, 1888. 
Pileus lj-2 cm across, convex, subumbonate, dark brick color when 
moist, lighter when dry, covered with a dense furfuraceous or mealy 
coat which soon disappears. Lamellae free, rounded behind, nearly 
plane, unequal, chestnut-brown (at first purplish violet or purplish- 
brown), becoming lighter when dry and more or less tinged with brick- 
red. Stem slender, 3-4 cm high, l£-2 mm thick, more or less curved or 
bent, about the same color as the pileus, and like it furfuraceous at first, 
of fibrous texture, fistulose, the cavity loosely filled, rather brittle. 
Spores when fresh olive-brown, the green shade very distinct, elliptical, 
3.J-4 by 2 p. Basidia clavate, with the apex rounded, 15-20 by 6//. 
Spores becoming umber-brown in drying. There is no sign of any 
annulus on the stem. 
The pileus when young is sometimes brick color, but soon becomes 
grayish-buff, except the umbonate disk, which retains more or less of 
the reddish tint. The loose mealy covering of the pileus is very dis¬ 
tinct and does not entirely disappear in the mature plant. The margin 
of the pileus is not involute, hardly incurved, and is at first connected 
with the stipe by a loose webby veil, wLicli remains hanging to the 
margin as the pileus expands. The plant is sometimes sub-cespitose 
and often grows from pieces of wood buried in the soil. 
Resembles A. microsporns , Ell., in general appearance, but that has 
white spores and the stem strigose below and rooting. 
