11. Acetabularia.

12. Paxillus (spores are ferruginous or dingy white).

13. Bolbitius (ferruginous spores).

Melanosporæ, Dark Purple or Black Spores.

1. Chitonia.

2. Psalliota.

3. Stropharia.

4. Hypholoma.

5. Psilocybe.

6. Psathyra.