Group B - poroid fungi with a daedaloid or (in part) lamellate
Fertile Surface

1. Inner substance (context) of basidiocarp white or light colored (e.g., pale brown) or, if darker,
    then less than 1 mm thick.

    2. Basidiocarp occurring as large, complex cluster or rosette of large (often 10 cm or more broad),
        stemmed pilei ................................ ….........................................................Bondarzewia berkeleyi

    2. Basidiocarps not as above, not stemmed (sessile), simpler in structure

        3. Upper surface more or less glabrous, zonate or not

            4. Pore openings 1-4 mm wide, pore walls about 1 (or more) mm thick; upper surface not typically
                zonate; occurring mostly on oak (Quercus) and chestnut (Castanea) ................. Daedalea quercina

            4. Pore openings 0.5-1.5 mm wide; pore walls less than 1 mm thick; upper surface often concentrically
                grooved (sulcate); on various hosts.

                5. Upper surface grayish to typically brownish, zonate; pores whitish when young, brownish with
                    age; young pore surfaces bruising pinkish-brown

                    6. Pore surface maze-like; fruit body occurring on a wide variety of hardwoods,
                        including birch (Betula spp.) ........................................................... Daedaleopsis confragosa

                    6. Pore surface distinctly lamellate, fruit bodies restricted to birch .........Daedaleopsis septentrionalis

                5. Upper surface mostly white to whitish, not zonate; pores whitish, not bruising........Trametes elegans

        3. Upper surface pubescent, strongly zonate

            7. Marginal pores daedaloid .........................................................................Cerrena unicolor

            7. Marginal pores lamellate ............................................................................ Lenzites betulina

1. Inner substance (context) distinctly brown and more than 1 mm thick

    8. Basidiocarp less than 1 cm thick

        9. Upper surface hairy and zonate; on conifers only; pore surface golden-brown,
            mostly lamellate ............................................................................................Gloeophyllum sepiarium

        9. Upper surface glabrous, zonate; pores white to brownish, bruising pinkish-brown
            when young; on hardwoods

            10. Pore surface maze-like; fruit body occurring on a wide variety of hardwoods,
                        including birch (Betula spp.) ........................................................... Daedaleopsis confragosa

            10. Pore surface distinctly lamellate, fruit bodies restricted to birch .........Daedaleopsis septentrionalis

    8. Basidiocarp more than 1 cm thick

        11. Basidiocarp only on oak (Quercus) and chestnut (Castanea); pore openings 1-4 mm wide,
              pore walls 1-3 mm thick.....................................................................................Daedalea quercina

        11. Basidiocarp on a great variety of hardwoods; pore openings up to 1.5 mm in diameter,
              pore walls less than 1 mm thick; pores white to brownish, bruising pinkish-brown
              when young

              12. Pore surface maze-like; fruit body occurring on a wide variety of hardwoods,
                        including birch (Betula spp.) ........................................................... Daedaleopsis confragosa

              12. Pore surface distinctly lamellate, fruit bodies restricted to birch .........Daedaleopsis septentrionalis