eb filamentous or evanescent.
29. Gills adnate terrestrial CORTINARIUS
29. Gills decurrent, or acutely adnate,
mostly epiphytal, _Flammula_
27. Without a ring.
30. With rudimentary volva _Acetabularia_
30. Without a volva.
31. Gills adhering to the hymenophore,
and sinuate.
32. Cuticle fibrillose or silky _Inocybe_
32. Cuticle smooth viscid _Hebeloma_
31. Gills separating from the
hymenophore, and decurrent, PAXILLUS
26. Stem lateral or absent _Crepidotus_
25. With cartilaginous bark.
33. Gills decurrent _Tubaria_
33. Gills not decurrent.
34. Margin of pileus at first incurved _Naucoria_
34. Margin of pileus always straight.
35. Hymenophore free _Pluteolus_
35. Hymenophore confluent _Galera_

IV. Spores purple, sometimes brownish purple, dark purple,
or dark brown.--Pratellae.
36. Without cartilaginous bark.
37. Hymenophore free.
38. With a volva _Chitonia_
38. Without a volva _Psalliota_
37. Hymenophore confluent.
39. Veil normally ring shaped on the stem _Stropharia_
39. Veil normally adhering to the margin of
the pileus _Hypholoma_
36. With cartilaginous bark.
40. Gills decurrent _Deconica_
40. Gills not decurrent.
41. Margin of pileus at first incurved _Psilocybe_
41. Margin of pileus at first straight _Psathyra_

V. Spores black or nearly so.--Coprinarii.
42. Gills deliquescent COPRINUS
42. Gills not deliquescent.
43. Gills decurrent GOMPHIDIUS
43. Gills not decurrent.
44. Pileus striate _Psathyrella_
44. Pileus