Observation 72474: Ganoderma oregonense Murrill
When: 2011-07-14
Who: Byrain
No herbarium specimen
0 Sequences

Found by someone else in their backyard growing from a partially buried old elm wood pile that was completely engulfed by a lilac bush.

Proposed Names

40% (2)
Recognized by sight
58% (2)
Recognized by sight
-12% (2)
Recognized by sight
-89% (2)
Recognized by sight: The closest possibility is Ganoderma lucidum sensu lato. It has a density of 3-5 pores per millimeter.
73% (1)
Recognized by sight: I had previously voted Ganoderma lucidum and now I believe this is Ganoderma oregonense. The pileus of G. oregonense can grow up to 120 centrimeter in diameter, and this observation shows an immature specimen that could have grown close to that size. And after having a second look at its pore surface, they do measure 2-3(-4) per 1 millimeter. This leads me to believe this was Ganoderma oregonense.

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Eye3 = Observer’s choice
Eyes3 = Current consensus


Add Comment
Good suggestion Darv
By: Christian (Christian Schwarz)
2011-07-24 19:36:48 CDT (-0400)

and nice find Byrain!

By: Byrain
2011-07-24 19:19:40 CDT (-0400)

G. curtisii is the first thing I thought of when I was showed the specimen, but as you say the distribution was off and I have no experience with Ganoderma or and little with polypores in general.

As for the time sequence, do they always form a stem first? The other location I know this or something similar from seems to form the cap first or at least the stem develops underground for some time. I have been taking pictures of it with some regularly and I will post an observation of it if they survive to maturity. Which they may not since the area has a lot of foot traffic.

G. curtisii
By: Darvin DeShazer (darv)
2011-07-24 16:39:49 CDT (-0400)

Seems to resemble Ganoderma curtisii. At least it has all the right colors and is stipitate with a reddish base.
Shown here is a time sequence.
Overholts lists it as an Eastern US species on several genera of hardwoods, but not Elm. No records of it from Calif.

No conifer wood
By: Byrain
2011-07-23 15:39:37 CDT (-0400)

There weren’t any conifers where this was found, I also know another spot with younger specimens of something like this which are growing from the base/roots of an unidentified hardwood. It also showed no reaction when NaOH was used on the cap surface if that is indicative of anything.

Created: 2011-07-23 01:42:53 CDT (-0400)
Last modified: 2012-01-14 18:03:51 CST (-0500)
Viewed: 141 times, last viewed: 2017-06-09 18:55:15 CDT (-0400)
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