Group C - Poroid Fungi with round or angular pores and more
than one layer of tubes

1. Inner substance (context) yellowish brown to darker brown or pinkish to reddish

    2. Inner substance rosy pink to pinkish brown............................................................Fomitopsis cajanderi

    2. Inner substance yellowish-brown or darker brown

        3. Basidiocarp typically on living black locust (Robinia); upper surface black, furrowed and cracked;
            pore surface yellowish to reddish brown ...............................................................Phellinus robineae

            Note: There are many other Phellinus species which can only be reliably separated from each other
            using microscopic characters.

        3. Basidiocarp on various hardwood hosts (living or dead); upper surface not black and cracked but covered
            with a hard crust below which the inner substance is softer; pore surface white or brown

            4. Basidiocarp hoof-shaped; pore surface brown, not bruising...........................Fomes fomentarius

            4. Basidiocarps flat; pore surface white, bruising dark brown.....................Ganoderma applanatum

1. Inner substance white or light-colored

    5. Upper surface reddish at first, becoming brownish or blackish, usually with persistent reddish, resinous (sticky)
        crust on the rounded margin; pore surface whitish to yellowish; occurring on hardwoods and
        conifers........................................................................................................................Fomitopsis pinicola

    5. Not as above

        6. Basidiocarp occurring on the stumps and at the base of living and dead conifers......Heterobasidion annosum

        6. Basidiocarp occurring on hardwoods

            7. Basidiocarp white to cream, older specimens often with moss on top; on living hardwoods only,
                usually at the base of maple (Acer) ......................................................................Oxyporus populinus

            7. Basidiocarp with blackish, cracked and furrowed upper surface, pore surface light brown; occurring
                only on living or dead ash (Fraxinus); ..........................................................Perenniporia fraxinophila

        

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This page © 2006 by Gary Emberger, Messiah College