toward the consistency of Marasmius). =Collybia.= 92

=Margin= of the pileus at first straight,
pileus slightly bell-shaped, thin. =Mycena.= 93

=Gills= usually free, pileus deeply
plicate so that the gills are split where
they are attached to the pileus, pileus
membranaceous, very tender but not
diffluent. =Hiatula.=

=11=--=Plants= where bruised exuding a milky
or colored juice. =Lactarius.= 114

=Plants= not exuding a juice where
bruised. =Russula.= 125

=12=--=Gills= decurrent, dichotomous, edge
blunt. =Cantharellus.= 128

=Gills= not decurrent, plants parasitic
on other mushrooms. =Nyctalis.=

=13=--=Edge= of gills not split into two
laminae. 14

=Edge= of gills split into two laminae and
revolute. =Schizophyllum.= 136

=14=--=Plants= leathery, either fleshy,
membraneous, or gelatinous. 15

=Plants= corky or woody (placed by some
in Polyporaceae). =Lenzites.=

=15=--=Stipe= separate from the pileus
(hymenophore), easily separating. 16

=Stipe= continuous with hymenophore. 17

=16=--=Plants= tough and fleshy,
membranaceous or leathery. =Marasmius.= 130

=Plants= gelatinous and leathery. =Heliomyces.=

=17=--=Edge= of the gills acute. 18

=Edge= of the gills obtuse. 19

=18=--=Edge= of gills usually serrate. =Lentinus.= 134

=Edge= of gills entire. =Panus.= 134

=19=--=Gills= dichotomous. =Xerotus.=

=Gills= fold-like, irregular. =Trogia.= 137

There are only a few rare species of Hiatula, Nyctalis, Heliomyces and
Xerotus in the United States. None are here described.

THE OCHRE-SPORED AGARICS.

(The spores are yellowish brown or rusty brown.)

=Gills= not separating readily from 1

=Gills= sometimes separating readily
from the pileus, forked or anastomosing
at the base, or connected with vei