Group F - Poroid Fungi with round or angular pores, one
layer of tubes, Whitish to Pale Yellow to Light Tan context,
and a stem

1. Upper surface covered with a brownish or reddish, varnish-like layer or crust.

    Note: A varnished layer, if present, is typically hard, glabrous, and shiny or glossy at least when young.
    Upper surfaces of older varnished specimens may become dull if covered by a layer of deposited spores.

     2. Upper surface and stem covered with a reddish varnish

         3. On conifers, predominately hemlock (Tsuga canadensis);
             flesh of cap without melanoid bands or concentric growth zones .....................................Ganoderma tsugae

         3. On hardwoods

              4. Flesh of cap with melanoid deposits but without concentric growth zones.....................Ganoderma curtisii

              4. Flesh of cap without melanoid deposits but with concentric growth zones ....................Ganoderma sessile

     2. Upper surface covered with a brownish varnish, stem black ........................................Picipes badius

1. Upper surface not at all varnished, although sometimes reddish

     5. Pileus upper surface bright orange to salmon colored, without scales; pores small (3-5 per mm)

         6. Pore surface white; occurring as rosettes at base of tree or on ground nearby..........Laetiporus cincinnatus

         6. Pore surface bright yellow; occurring as single pilei to imbricate clusters on trunks of trees
             or fallen logs

             7. On living or dead deciduous trees ..................................................................... Laetiporus sulphureus

             7. On living or dead conifers ............................................................................... Laetiporus huroniensis

     5. Pileus upper surface not bright orange or salmon; if orangish, then caps are scaly and pores are
         large (1-2 mm wide)

         8. Stem more or less branched, giving rise to compound clusters and/or rosettes of centrally or laterally
             stemmed or attached pilei; occurring at the base of trees or from buried roots

              9. Pilei small (mainly less than 7 cm broad) and numerous

                  10. Pilei laterally stipitate .................................................................................. Grifola frondosa

                  10. Pilei centrally stipitate ...............................................................................Polyporus umbellatus

              9. Pilei larger (often 10 cm or more broad) and not as numerous

                  11. Basidiocarp becoming blackish where handled and on drying.......................Meripilus sumstinei

                  11. Basidiocarp not becoming blackish .........................................................Bondarzewia berkeleyi

         8. Stem not branched, each stem giving rise to one pileus (Note: stems of 2- 3 pilei may originate from a
             common base); occurring on logs, trunks, and fallen stems.

             12. Stem black or very dark brown at least in part

                 13. Pores 0.25 to 2 per mm............................................................................Cerioporus squamosus

                 13. Pores 4 to 8 per mm

                       14. Pileus surface chestnut brown to darker...............................................Picipes badius

                       14. Pileus surface cinnamon buff to tan ......................................................Cerioporus leptocephalus

             12. Stem not black or very dark brown

                 15. Stem poorly developed, stubby, lateral; pileus semicircular to kidney-shaped

                       16. Cap margin projecting downward below the level of the tubes; cap pallid to pale brown on top;
                             pores 3-4/mm .......................................................................................Fomitopsis betulina

                       16. Cap margin not projecting downward; cap orange-yellow to reddish-orange (fading with age)
                             on top, scaly; pores 1-2/mm ..................................................................Neofavolus alveolaris
                 15. Stem well-developed, central to eccentric; pileus circular in outline

                       17. Pores 2-3 per mm; pileus smoky-brown or smoky-black.........................Lentinus brumalis

                       17. Pores 0.5 to 1 per mm; pileus lighter in color

                             18. Cap margin fringed with hairs............................................................Lentinus arcularius

                             18. Cap margin lacerate, not fringed with hairs ...................................Bresadolia craterella