5. Basidia divided transversely by one to three horizontal septae Plate 60 (p. 183) Auriculariales (p. 182) Basidia divided into two or four cells by vertical septae Plate 61 (p. 185) Tremellales (p. 184) A. AGARICS AND THEIR RELATIVES Key to major genera 1. Spores distinctly coloured in mass and coloured individually under the microscope 2 Spores not, or faintly, coloured in mass and hyaline under the microscope 25 2. Spores blackish or some shade of brown 8 Spores pinkish 3 3. Stem laterally attached to the cap or absent _Claudopus_ (and some species of _Clitopilus_) Stem centrally attached to the cap 4 4. Stem with a cup-like structure enveloping the base _Volvariella_ Stem lacking any special structure at its base 5 5. Gills not attached to the stem (free), or with part attached to and descending down the stem (decurrent) 6 Gills attached to the stem but not descending down the stem 7 6. Gills remote to free from the stem _Pluteus_ Gills distinctly attached and descending down the stem _Clitopilus_ (see also _Eccilia_ p. 102) 7. Gills broadly attached to the stem (adnate) _Entoloma_ Gills narrowly attached to the stem (adnexed) _Leptonia_ & _Nolanea_ 8. Stem laterally attached to the cap _Crepidotus_ Stem centrally attached to the cap 9 9. Spore-print some shade of brown 10 Spore-print blackish to purplish black 18 10. Spore-print bright rust-brown 11 Spore-print dull clay-brown or ochraceous 16 11. Stem with the veil girdling the stem (ring), or cobweb-like (cortina) 12 Stem without the veil girdling the stem or when present then easily lost 13 12. Stem with distinct ring or ring-zone _Pholiota_ & related genera Stem with cobweb-like veil or faint filamentous ring-zone _Cortinarius_ & _Gymnopilus_ 13. Gills attached to the stem but not descending down the stem (adnexed to adnate) 14