Part 2

KEW, June, 1902.

AGARICACEAE, Fries.

Hymenium covering the entire surface of radiating lamellae or gills. Spores one-celled.

Primary divisions of the Agaricaceae depend on the colour of the spores as seen in the mass, when deposited on an opaque substance; and not as seen under the microscope by transmitted light.

I. LEUCOSPORAE.

Spores white. In some cases with a tinge of yellow or pink. In some species of Russula the spores are clear ochre, but such species belong obviously to Russula notwithstanding.

II. CHLOROSPORAE.

Spores clear green or bluish-green.

III. RHODOSPORAE.

Spores salmon-colour or pink.

IV. OCHROSPORAE.

Spores ochraceous or rust-colour.

V. MELANOSPORAE.

Spores black, blackish-brown, or black with a purple tinge.

LEUCOSPORAE.

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.