Observation 25774: Fomes fomentarius (L.) Fr.

When: 2009-09-25

Collection location: Forest near Elgin St., Pembroke, Ontario, Canada [Click for map]

Who: Paul Derbyshire (Twizzler)

No specimen available

Growing on a dead Betula allegheniensis in Zone 05, accompanied by another polypore ( http://www.mushroomobserver.org/25775 ) and by a batch of Armillaria ( http://www.mushroomobserver.org/25772 ).

Proposed Names

-23% (3)
Recognized by sight: Pore surface is pale pink
16% (4)
Recognized by sight

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Eye3 = Observer’s choice
Eyes3 = Current consensus


Add Comment
By: Paul Derbyshire (Twizzler)
2009-09-26 12:17:15 PDT (-0700)

My comment was referring to Fomitopsis cajanderi, not Fomes fomentarius, and cited the former’s entry in Lincoff. Sorry for any confusion.

Error in Lincoff
By: Darvin DeShazer (darv)
2009-09-26 12:11:08 PDT (-0700)

There must be an error in the Audubon book. Gilbertson lists Fomes fomentarius as growing on “living and dead trees in several genera of hardwoods, particularly common on Betula and Alnus”. He also lists the following genera: Acer, Carya, Fagus, Malus, Populus, Prunus, Pseudotsuga, Pyrus, Salix, Tsuga & Umbellularia. Most of the photos show it fruiting on Birch.

f fomentarius..
By: Jonathan M
2009-09-26 07:26:09 PDT (-0700)

Have already been reported on tree but that rare.

By: Paul Derbyshire (Twizzler)
2009-09-25 21:14:23 PDT (-0700)

From my copy of Lincoff (emphasis mine):

Habitat: On dead conifers, such as pine, hemlock, fir, Douglas-fir, spruce, larch, and juniper; rarely on deciduous trees.

It has been known to occur on deciduous trees, and this resembles a somewhat more hoof-shaped version of the same fungus with pale pink pores seen all over that Zone. It resembles it more than it resembles the F. fomentarius I’ve seen nearby, which has a paler upper surface and white pores.

it’s growing on birch.
By: Noah Siegel (Noah)
2009-09-25 20:51:20 PDT (-0700)

pink pores or not…

What part…
By: Paul Derbyshire (Twizzler)
2009-09-25 20:46:46 PDT (-0700)

…of “it has pink pores” doesn’t someone understand? :)

Created: 2009-09-25 19:05:21 PDT (-0700)
Last modified: 2013-11-26 07:41:13 PST (-0800)
Viewed: 62 times, last viewed: 2017-07-12 09:21:21 PDT (-0700)
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