Observation 160886: Fomitopsis ponderosa E.B. Bailey nom. prov.

When: 2014-03-06

Collection location: Flagstaff, Arizona, USA [Click for map]

Who: Terri Clements/Donna Fulton (pinonbistro)

No specimen available

On ponderosa pine stump. Yellow orange cap. Tough leathery whitish flesh. Tiny round cream colored pores. Unpleasant odor. KOH on flesh turns red brown. This specimen lacked varnish on the cap but there was varnish underneath the conk where it attached to the wood. Could the heavy rains of 3/1 and 3/2 removed the varnish if the specimens were submerged in or scoured by flood waters?

3/8/14: I believe these were scoured by flood waters—see ob 160946.

Species Lists



Proposed Names

3% (2)
Used references: Kuo, M. (2010, February). Fomitopsis pinicola. Retrieved from the MushroomExpert.Com Web site: http://www.mushroomexpert.com/fomitopsis_pinicola.html
Based on chemical features: KOH red brown on flesh
77% (2)
Eye3 Eyes3
Recognized by sight: flesh-colored to yellow red, becoming darker red with age; smooth when young, rapidly becoming rough and covered with irregular nodules. Older specimens show numerous ridges, formed by regular additions (annual) on the edge and below. Top covered after the first year with a hard, brittle, dull, resinous substance, which cracks as it grows old, and looks sandy or crystalline.

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Eye3 = Observer’s choice
Eyes3 = Current consensus


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Created: 2014-03-07 18:52:12 CST (-0500)
Last modified: 2015-03-02 19:32:07 CST (-0500)
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