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......Phlebia incarnata

        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) pores that form tooth-like structures, or 3)
        sinuous or winding pores very much longer in one direction (mazelike or daedaleoid), or 4) pores that
        form gill-like (lamellate) structures

        5. Fertile surface with pores that appear as toothlike, mazelike, or lamellate

            6. Fertile surface toothlike .............................................................................................................Group A

            6. Fertile surface as daedaleoid or lamellate ...................................................................................Group B

        5. Fertile surface with distinct round or angular pores

            7. 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

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

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

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

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

                8. Inner substance (context) white, whitish, pale yellow or very light tan

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

                    10. Basidiocarp not stemmed (sessile)

                          11. 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.

                                 12. On coniferous wood only.................................................................Ganoderma tsugae

                                 12. On hardwoods only ...................................................................... Ganoderma lucidum

                          11. Upper surface not at all varnished as described above

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

                                      14. Pore surface distinctly yellow

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

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

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

                               13. Pore surface not as above

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

                                     16. Margin not as above

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

                                           17. Pileus surface not uniformly brown in color

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

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