Group C - Gilled fungi with a central to eccentric stem, no annulus,
even gill edges, attached or free gills, and white or pinkish spores

1. Spore print white to buff

    2. Cap 5-15 cm wide, whitish at first, with age, becoming tannish, often cracking and forming minute scales
        or scaly patches; gills attached, whitish to cream; stalk whitish, stout, eccentric, 5-10 cm long, 1-2 cm thick, often
        bending from point of attachment; occurring singly or in small groups on hardwoods, often from wounds
        on living box elder (Acer negundo) trees ................................................................. Hypsizygus ulmarius

    2. Not with above combination of characteristics  

        3. Cap with conspicuous fibers, scales, fibrous scales, or hairs of a different color than the cap background color

            4. Gills free

                5. Cap scaly with reddish to reddish-brown scales ......................................Leucoagaricus americanus  

                5. Cap with long, radially arranged tawny hairs.................................................... Crinipellis zonata

            4. Gills attached

                6. Cap brownish-grey, streaked with dark, radial fibers; gills white; white rhizomorphs
                    at base of stalk................................................................................... Megacollybia rodmanii

                6. Cap yellowish to yellowish-orange; gills yellow; stalk without rhizomorphs

                    7. Cap yellowish with blackish, fibrous scales over the center.................... Tricholomopsis decora

                    7. Cap yellowish-orange with reddish, fibrous scales.......................................Tricholomopsis rutilans

        3. Cap smooth, without conspicuous fibers, scales, fibrous scales, or hairs of a different color than         
            cap background color

            8. Basidiocarp very small (caps from 2 mm to 3 cm wide, stalks up to 1.5 mm thick);
                caps pleated, sunken in center, gills attached to a collarium (collar)

               9. Cap white; stalk tough, shiny, black; gills attached to a collar surrounding the
                   stalk...........................................................................................................Marasmius rotulu

               9. Cap brownish; stalk velvet-brown; gills attached to a collar; mushroom has a
                   foul odor............................................... .............................................Gymnopus foetidus

            8. Basidiocarp not as above: cap not pleated or sunken in the center, collarium absent

                10. Stalk very long (8-20 cm) above ground and having an equally long rooting portion
                    below ground, attached to a root; cap brownish and sticky, sometimes
                    wrinkled; gills white...................................................................................Hymenopellis furfuracea

                10. Stalk not as above; mushroom on wood above ground

                    11. Mushroom orangish with conspicuous red-orange gill edges or mushroom reddish-brown
                          with flesh and stalk exuding blood-red juice where cut

                          12. Gill edges red-orange......................................................................Mycena leaiana

                          12. Flesh and stalk exuding blood-red juice...................................Mycena haematopus

                     11. Mushroom without red-orange gill edges or blood- red juice

                           13. Cap sticky and tawny in color; stalk yellowish above and velvety dark below with short
                                 brown to blackish-brown hairs below; gills cream to yellow ........... Flammulina velutipes

                           13. Not as above

                                 14. Cap, gills, and stalk lavender when young but fading to brownish or paler
                                       with age ............................................................................Baeospora myriadophylla

                                 14. Not as above

                                        15. Cap conical to bell-shaped to hemispherical, brownish to grayish, paler toward
                                              the margin; stalk not reddish-brown above, base covered or not by white mycelium;
                                              odor and taste unpleasant; single or in cespitose clusters on decayed hardwood logs
                                              and stumps ....... Mycena galericulata and similar species.

                                       15. Cap convex to nearly flat, reddish-brown fading to tan; base of stalk
                                             covered by white mycelium; odor and taste not distinctive

                                             16. Often growing in cespitose clusters on conifer logs
                                                   and decayed wood ...................................................Connopus acervatus
                                       

                                             16. Scattered to numerous on wood, landscape wood chip mulch,
                                                   sawdust, leaf litter, and twigs in hardwood or conifer forests;
                                                   sometimes forming fairy rings; may have jelly-like growths
                                                   due to parasite ..........................................................Gymnopus dryophilus                                    

1. Spore print pink or pinkish/salmon

    Note: A large genus, Pluteus, will key out here. Unfortunately, most Pluteus species can only be reliably
               separated from each other using microscopic characters. Only a few common and conspicuous
               Pluteus species are keyed below. Some of the additional diversity within the genus is illustrated
               on the Pluteus spp. page.

    17. Cap reddish to pinkish and conspicuously netted with ridges and pits;
           gills attached and pinkish....................................................................................Rhodotus palmatus

    17. Cap yellowish or brownish; gills free and pinkish at maturity

           18. Cap and stalk yellow....................................................................................Pluteus chrysophlebius

           18. Cap brownish

                 19. Cap dark brown; gill edges dark brown to black; stalk whitish,
                       covered by small dark fibers .............................................................Pluteus atromarginatus

                 19. Cap brownish; gill edges same color as gill; stalk whitish .............................Pluteus cervinus