21. Veil remaining attached to margin of pileus,
often not seen in old specimens, Hypholoma.
Veil on stem as a ring, 22.
Margin of cap incurved when young, Naucoria.
22. Gills separate on the stem, Agaricus or Psalliota.
Gills united with stem, Stropharia.
Gills adnate or sinuate, 23.
23. Margin of pileus incurved when young, Psilocybe.
Margin of pileus always straight, Psathyra.
24. Pileus of normal form, 25.
25. Pileus fleshy, membranaceous or deliquescent, 26.
26. Gills deliquescent--inky fluid, Coprinus.
Gills not deliquescent--ring present, Annellaria.
Gills not decurrent--ring wanting, 27.
27. Pileus striate--plants small, Psathyrella.
Pileus not striate, stem fleshy, margin
exceeding the gills, Panaeolus.
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