= present and distinct, annulus
wanting. =Volvaria.= 140

=Volva= and annulus wanting. =Pluteus.= 138

=3=--=Stipe= fleshy to fibrous, margin of
pileus at first incurved. 4

=Stipe= cartilaginous. 5

=4=--=Gills= sinuate. =Entoloma.= 143

=Gills= decurrent. =Clitopilus.= 142

=5=--=Gills= not decurrent (or if so only by
a minute tooth), easily separating from
the stipe. 6

=Gills= decurrent, pileus umbilicate. =Eccilia.= 148

=6=--=Pileus= slightly convex, margin at first
incurved. =Leptonia.= 147

=Pileus= bell-shaped, margin at first
straight and pressed close against
the stipe. =Nolanea.=

No species of Nolanea are described here.

THE BROWN-SPORED AGARICS.

(The spores are dark brown or purplish brown.)

=Pileus= easily separating from the
stem; gills usually free. 1

=Pileus= continuous with the stem;
gills attached. 2

=1=--=Volva= wanting, annulus
present. (Psalliota Fr.) =Agaricus.= 18

=Volva= present, annulus wanting. =Chitonia.=

=Volva= and annulus wanting. =Pilosace.=

=2=--=Veil= present. 3

=Veil= wanting or obsolete. 4

=3=--=Annulus= present, gills
attached. =Stropharia.= 31

=Annulus= wanting, veil remaining
attached to margin of pileus. =Hypholoma.= 26

=4=--=Stipe= tenacious, margin of pileus first
incurved. 5

=Stipe= fragile, margin of pileus at
first straight. =Psathyra.=

=5=--=Gills= sub-triangularly decurrent. =Deconica.=

=Gills= not decurrent. =Psilocybe.=

But few species of Psathyra, Deconica, Chitonia and Pilosace are noted
from the United States. None are here described.

THE BLACK-SPORED AGARICS.

=Pileus= present to which the gills are
attached. 1