West Block GNP
Growing on standing Thorny Buffaloberry (Shepherdia argentea)
in riparian area of grassed and shrubbed areas matrix (low land by the Frenchman River Valley)

Species Lists


basic top view
pores underside with ruler
top view with ruler (~7cm long, less deep)
perennial (see pore tube layers)

Proposed Names

-28% (1)
Recognized by sight
Used references: Kuo, M. (2010, February). Fomes fomentarius. Retrieved from the MushroomExpert.Com Web site:
-1% (2)
Used references: MD 2nd Ed (Arora 1986) pg 579 – see notes under Fomitopsis pinicola. Whitish to yellow-brown flesh, grows on buffalo berry (a shrub).
28% (1)
Recognized by sight

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= Observer’s choice
= Current consensus


Add Comment
By: Chris Hay (hayfield)
2014-10-04 10:29:05 PDT (-0700)

My initial quick ID of Fomes fomentarius is almost certainly wrong.

With further careful reading in Mushrooms Demystified 2nd Ed (Arora 1986) I found Fomitopsis ellisianus (pg. 579). The key brought me to Fomitopsis pinicola (which I knew couldn’t be right), but in the comments below it reads of F. ellisianus “grows on buffalo berry (a shrub)” which is correct for this specimen. This name someone already added to MO.

Further internet searches led me to Fomes ellisianus. In the full text of The Polyporaceae of North America.-III. The Genus Fomes this name is keyed and given some further info:
This species was described from plants collected by Anderson
in Montana during the summer of 1889. Its only host thus far
reported is Shepherdia argentea Nutt, on the living trunks and
branches of which it is very abundant in the Teton Valley.
This specimen was also on Shepherida argentea and located in south-eastern Saskatchewan (close to the border of Montana).

A search for the above on Index Fungorum yields the current name Perenniporia ellisiana, of which Fomes ellisianus is listed under synonymy. A search for Fomitopsis ellisianus yields no results.