Key to Poroid Fungi

1. Basidiocarp 1) almost globose; 1-3 cm diameter; on coniferous wood; pore surface covered
    by partial veil or 2) basidiocarp extremely small (1-3 mm in diameter), pendent from a stalk-like
    base

    2. Basidiocarp globose with pores covered by a partial veil................................................. Cryptoporus volvatus

    2. Basidiocarp extremely small and pendent ........................................................................Porodisculus pendulus

1. Basidiocarp not as above

    3. Fertile surface superficially porelike but consisting of a network of shallow pits, wrinkles, and
        branched folds with cross-veins

        4. Upper surface of pileus coral pink, nearly glabrous; projecting up to 8 cm from substrate......Byssomerulius incarnatus

        4. Upper surface of pileus white, wooly; projecting up to 1.5 cm from substrate......................Phlebia tremellosa

    3. Fertile surface with 1) distinct round or angular pores, or 2) tooth-like structures, or 3) sinuous or
        winding pores very much longer in one direction (mazelike or daedaleoid), or 4) gill-like (lamellate)
        structures

        5. Basidiocarp resupinate; whitish to cream-colored fertile surface with some combination of
            round to angular to oblong pores or maze-like or tooth-like areas ......................................Xylodon paradoxus

        5. Basidiocarp not resupinate; typically with well-formed caps or cap-like structures

            6. Fertile surface appears toothlike, mazelike, or lamellate

                7. Fertile surface distinctly toothlike ..............................................................................................Group A

                7. Fertile surface daedaleoid and/or lamellate.................................................................................Group B

            6. Fertile surface with distinct round or angular pores

                    8. Basidiocarp hard and woody when fresh and showing more than one layer of tubes (i.e. more
                        than one year’s growth) when cut vertically down the center (perennial polypores)...................Group C

                    8. Basidiocarps soft, fleshy, leathery, fibrous, or corky when fresh and showing only one layer
                        of tubes when cut down vertically down the center

                        9. Inner substance (context) yellowish brown or darker brown or decidedly pinkish, reddish,
                              yellowish, or orange

                              10. Context pinkish to reddish or yellowish or orange...........................................................Group D

                              10. Context yellowish brown or darker brown......................................................................Group E

                        9. Inner substance (context) white, whitish, pale yellow or pale brown

                              11. Basidiocarp with a more or less distinct simple or branched stem..................................Group F

                              11. Basidiocarp not stemmed (sessile)

                                    12. Upper surface covered with a reddish or brownish, 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.

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

                                          13. On hardwoods

                                                14. Flesh of cap without melanoid bands but with concentric
                                                      growth zones ..................................................................................Ganoderma sessile

                                                14. Flesh of cap with melanoid bands but without concentric
                                                      growth zones ...................................................................................Ganoderma curtisii

                                    12. Upper surface not at all varnished as described above

                                          15. Pore surface distinctly yellow or more or less smoke-colored or black

                                                16. Pore surface distinctly yellow

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

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

                                                16. Pore surface more or less smoke-colored or black....................................Group G

                                          15. Pore surface not as above

                                                18. Margin of pileus projecting downward 5 mm or more beyond the pore surface;
                                                      found only on birch (Betula) .......................................................Piptoporus betulinus

                                                18. Margin not as above

                                                       19. Pileus surface more or less entirely brown or blackish; pores white,
                                                             bruising brownish, flesh watery when young......................... Ischnoderma resinosum

                                                       19. Pileus surface not uniformly brown in color

                                                             20. Basidiocarp soft and spongy in texture when fresh,
                                                                   context often watery..........................................................................Group H

                                                             20. Basidiocarp firm and corky, fibrous or tough and leathery when
                                                                   fresh...................................................................................................Group I