Part 5

15. Gills free of the stem and the whole fruit-body very fragile Bolbitius

Gills attached to and running down the stem (decurrent), easily separable from the cap-tissue and frequently veined at apex of stem Paxillus

16. Cap scaly, fibrillose and roughened Inocybe

Cap smooth, greasy or viscid 17

17. Cap-surface composed of rounded cells Agrocybe

Cap-surface composed of filamentous cells Naucoria & Hebeloma

18. Gills or complete fruit-body becoming liquefied Coprinus

Neither the gills nor fruit-body collapsing into a slurry of cells 19

19. Gills free to remote from the stem or attached and descending down the stem (decurrent) 20

Gills attached in some way to the stem but not descending down the stem (adnate to adnexed) 21

20. Gills decurrent; stem possessing a cobweb-like veil Gomphidius and Chroogomphus

Gills remote or free; stem possessing a usually persistent ring Agaricus

21. Gills distinctly spotted or distinctly mottled; stem stiff but breaking with a snap when bent; growing on dung or in richly manured areas Panaeolus

Gills not spotted or distinctly mottled; stem cartilaginous or not, and fruit-body growing on dung or not 22

22. Gills broadly attached to the stem (adnate) and with a veil girdling the stem Stropharia

Gills narrowly attached to the stem (adnexed) or with concave dentation near the stem (sinuate), or if adnate then lacking a ring 23

23. Gills with concave indentation near the stem (sinuate) and cap and stem with a cobweb-like veil Hypholoma

Gills attached to the stem but lacking a distinct concave indentation near the stem 24

24. Stem stiff but breaking with a snap when bent; edge of cap incurved at first and cap-surface composed of filamentous cells Psilocybe

Stem fragile; edge of cap straight even when young and cap-surface composed of rounded cells Psathyrella

25. Fruit-body fleshy and readily decaying, often firm but never tough 26

Fruit-body tough and not easily decaying 47

26. Parasitic on other agarics Nyctalis

Not parasitic on other agarics 27

27. Spore-bearing layer on fold-like often forked gills or simply on irregularities 28

Spore-bearing layer (hymenium), on distinct well-formed gills 29

28. Spore-bearing layer on fold-like gills Cantharellus

Spore-bearing layer on surface of irregularities Craterellus