Observation 74102: Ganoderma P. Karst.

When: 2011-07-31

Collection location: Davis, California, USA [Click for map]

Who: Byrain

Specimen available

Growing from the trunk and roots of a hardwood tree that could be dying possibly in the Juglandaceae family, which is also being parasitized by mistletoe. The pores stain brown instantly and also turn brown when NaOh is added. Most pictures were taken on July 31st, a few more were later taken on August 14th.


August 14th
August 14th
August 14th
August 14th
10-05-11, KOH reactions,
context – blackish
pore surface – brown
cap surface – didn’t react

Proposed Names

89% (2)
Eye3 Eyes3
Recognized by sight: varnished top
73% (1)
Recognized by sight: This is definitely Ganoderma lucidum.

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Eye3 = Observer’s choice
Eyes3 = Current consensus


Add Comment
I hear ya…
By: ndoll
2011-08-19 14:34:51 PDT (-0700)

The glossy Ganoderma do require a lot of practice to navigate.

The general rule with Reishi is do not even attempt the ID without being able to physically examine the specimen in question. It is a hundred times less complicated that way. However, I still suggest that your 3 Reishi observations are the species Ganoderma lucidum.

By: Byrain
2011-08-19 13:28:45 PDT (-0700)

I would of never guessed that my three Ganoderma observations were all G. lucidum or even the same species. My recent investigations into Ganoderma is just making it look more complicated to me, but I would think this observation at least shows that form can be quite variable.

This is Ganoderma lucidum.
By: ndoll
2011-08-19 13:18:15 PDT (-0700)

A quick description: it grew from hardwood in sessile overlapping clusters; it has the trademark pileus with a lucid, glossy surface; and the density of pores measure 3-5 per 1 millimeter.

Additional note: I believe that the Reishi in California have extralimital features, or slight variations, differing from the range currently circumscribed. Either that or I suggest that possibly there may be a lucid Ganoderma species in California that is unique to others; or at least something unique to others found in the continental United States.

It’s possible.

Created: 2011-08-16 22:22:29 PDT (-0700)
Last modified: 2015-01-17 10:29:16 PST (-0800)
Viewed: 113 times, last viewed: 2017-06-09 17:14:45 PDT (-0700)
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