Chapter I: Haplophyllae

Margin of gills acute; i.e. not longitudinally split or grooved.

* MOLLES. More or less fleshy, soft, and soon decaying or
shrivelling (not corky, woody, or rigid).

+ _Ring, or volva, or both present, or gills free._

=Amanita=. Volva and ring present. Gills usually free, rarely adnexed or adnate. (Volva sometimes not evident round base of stem, but loose patches on pileus prove its presence.)

=Amanitopsis=. Volva present, ring absent; gills free.

=Lepiota=. Ring present, volva absent; gills free. (In some sp. the ring is imperfect, and in a few the gills are slightly attached.)

=Hiatula=. Gills free; volva and ring absent.

=Armillaria=. Ring present, volva absent; gills attached.

++ _Gills adnexed or adnate; ring and volva absent._

=Tricholoma=. Gills sinuate; stem fleshy.

=Russula=. Pileus fleshy; gills very rigid, brittle.

=Mycena=. Pileus slender, campanulate, usually striate, margin straight and adpressed to stem when young.

=Collybia=. Pileus rather fleshy, more or less plane, margin incurved when young; stem cartilaginous outside.

=Marasmius=. Tough, drying up and reviving when moistened; gills often connected by veins.

+++ _Gills decurrent._

=Lactarius=. Gills and flesh exuding milk when broken. (In some sp. the gills are adnate.)

=Hygrophorus=. Gills thick at the base, edge acute, rather waxy, often branched; pileus often hygrophanous. (In some sp. the gills are adnate or even free.)

=Clitocybe=. Gills thin, pliant, sometimes powdered with the spores; stem fibrous outside.

=Omphalia=. Gills thin, pliant, stem cartilaginous outside.

=Pleurotus=. Growing on wood. Stem lateral or excentric when present.

=Cantharellus=. Gills narrow, edge thick, rather waxy, forking.

=Arrhenia=. Gills reduced to very slight wrinkles or veins.

=Nyctalis=. Gills thick, edge blunt. Parasitic on fungi, or among dead leaves, &c.

** TENACES. Coriaceous, corky, or woody, persistent, rigid when
dry.

=Lentinus=. Pileus coriaceous; gills decurrent, edge toothed or eroded.

=Panus=. Pileus coriaceous; gills decurrent, edge quite entire.

=Xerotus=. Pileus coriaceous; gills forking, edge thick.

=Lenzites=. Horizontal, sessile, woody or corky; gills radiating from behind.