No species of Pluteolus are here described.

THE ROSY-SPORED AGARICS.

(The spores are rose color, pink, flesh or salmon color.)

Stipe central. 1
Stipe eccentric or none and pileus lateral.Claudopus.[149]
1—Pileus easily separating from the stipe, gills free. 2
Pileus confluent with the stipe and of the same texture, gills attached, in some becoming almost free. 3
2—Volva 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.