Observation 97923: Fomitopsis P. Karst.

When: 2012-06-21

Collection location: MP 7.6 E. Larch Mountain Rd., Multnomah Co., Oregon, USA [Click for map]

Who: Daniel B. Wheeler (Tuberale)

No specimen available

The too ubiquitous Heterobasidion annosus. Here on sappling Western hemlock.


Tube layer underneath, slightly more white. Just noticed the slight pink cast to the upper surface here.
Yellowish tint to pore surface after being scratched with a fingernail.

Proposed Names

20% (3)
Used references: Arora, Mushrooms Demystified; Audubon Field Guide to North American Mushrooms, ed. Lincoff.
19% (2)
Recognized by sight: growing on hemlock
41% (2)
Recognized by sight: Most likely Fomitopsis pinicola.

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Eye3 = Observer’s choice
Eyes3 = Current consensus


Add Comment
It was fruiting near the base.
By: Daniel B. Wheeler (Tuberale)
2012-06-22 17:19:24 CDT (-0400)

The close-ups are from a sporocarp about 4.5 feet up. And the upper observation is from about 15 feet up the snag.

Snag, a standing dead log. Probably dead for as long as it was living, about 20-25 years. Stand really too crowded, and I suspect many of the affected stems were killed while still trying to stay alive, but too many crown trees nearby. One massive Western hemlock is over 6 feet diameter at breast height, and easily 200 feet or more tall, just by eyeballing it. Lots of downed logs and standing snags, as well as branches. A clear-cut area, fortunately not very wide or long, is about 50 feet away from this obs. On north side of road additional old-growth Western hemlock and scattered Douglas-fir make this one of my favorite close-by collecting sites. Such diversity!!

Root pathogen
By: Darvin DeShazer (darv)
2012-06-22 16:27:33 CDT (-0400)

Heterobasidion is a root rot pathogen and fruits near the soil line. Pores start out white but change to a pinkish beige.

By: christopher hodge (christopher hodge)
2012-06-22 13:39:39 CDT (-0400)

Created: 2012-06-21 18:40:42 CDT (-0400)
Last modified: 2015-12-20 13:00:36 CST (-0500)
Viewed: 57 times, last viewed: 2018-08-25 12:36:16 CDT (-0400)
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