Gills toothed LENTINUS 15. Gills not toothed PANUS 15. Gills channelled longitudinally or crisped TROGIA 15. Gills splitting longitudinally SCHIZOPHYLLUM 15. Gills anastomosing LENZITES II. Spores rosy or salmon color--Hyporhodii 16. Without cartilaginous bark 17. Hymenophore free 18. With a volva _Volvaria_ 18. Without a volva 19. With a ring _Annularia_ 19. Ringless _Pluteus_ 17. Hymenophore confluent, not free 20. Stem central 21. Gills adnate or sinuate _Entoloma_ 21. Gills decurrent _Clitopilus_ 20. Stem lateral or absent _Claudopus_ 16. With cartilaginous bark 22. Gills decurrent _Eccilia_ 22. Gills not decurrent 23. Pileus torn into scales _Leptonia_ 23. Pileus papillose, sub-campanulate. 24. Gills membranaceous, persistent _Nolanea_ 24. Gills sub-deliquescent BOLBITIUS III. Spores brownish, sometimes rusty, reddish or yellowish brown.--Dermini. 25. Without cartilaginous bark. 26. Stem central. 27. With a ring. 28. Ring continuous _Pholiota_ 28. Ring arachnoid, like a spider's web 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.