Observation 97930: Ganoderma curtisii (Berk.) Murrill
When: 2012-06-21
Herbarium specimen reported

Notes: Growing off of the stump of a red oak which almost killed me.

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Eye3 = Observer’s choice
Eyes3 = Current consensus

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Macroscopic section
By: Stephen (Ιερονυμοσ)
2012-08-07 16:25:45 PDT (-0700)

After getting access to the aforementioned text and looking at the cross section of G. ravenelii, this specimen is indeed either G. meredithiae or G. curtisii.

Difference in Pileal Cells
By: Stephen (Ιερονυμοσ)
2012-07-18 21:34:26 PDT (-0700)

So all I need do is take a thin, tangetnial section and look toward the pileus? Can you list the differences in such cells for me? I don’t have access to the text. That’ll also give me a nice shot of the interior context.

Additional note
By: ndoll
2012-07-18 17:52:13 PDT (-0700)

Ganoderma ravenelii is reported from North Carolina, South Carolina, Texas, and Florida. It is similar to G. curtisii, but some differences are: stipe connection, interior context, density of pores, spore size, spore shape, and cuticle cells. It requires extra effort to examine those features! That is why retaining voucher specimens is necessary.

Referenced:
2008. Mycotaxon 103: 33-40.

Herbarium Specimen Available
By: Stephen (Ιερονυμοσ)
2012-07-18 05:30:56 PDT (-0700)

The specimen you see in image 229820 is available for study. Where or who would I send these to for confirmation?

I thought about making some tea, but I haven’t gotten to it yet. :P

Hi Stephen,
By: ndoll
2012-07-17 11:36:00 PDT (-0700)

I agree this is likely Ganoderma curtisii. That is my guess, too. I have examined a few from Georgia and they were all G. curtisii.

Your photo of the pore surface is a very important measurement for identifying these online. The density of its pores looks to be about 4-6 per millimeter.

But furthermore, experts require herbarium samples for determining species of Ganoderma. It is a requirement for identifying these with any certainty.

Another closely-related species is Ganoderma lucidum which has about 3-5 pores per millimeter, and probably grows in Georgia associated with hardwoods.

I’ve got it growing on cardboard now.
By: Stephen (Ιερονυμοσ)
2012-06-27 15:20:32 PDT (-0700)

fingers crossed

Created: 2012-06-21 17:02:35 PDT (-0700)
Last modified: 2012-07-18 07:31:33 PDT (-0700)
Viewed: 273 times, last viewed: 2016-11-01 13:50:05 PDT (-0700)
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