Observation 109134: Ganoderma sessile Murrill
When: 2012-09-09
No herbarium specimen
0 Sequences

Proposed Names

-18% (2)
Recognized by sight
60% (2)
Recognized by sight

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Eye3 = Observer’s choice
Eyes3 = Current consensus


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By: ndoll
2012-09-13 20:51:42 PDT (-0700)

Ganoderma lucidum is a good call, but a more accurate guess is Ganoderma resinaceum!

with your specimen -
-its density of pores looks about 2-3 per millimeter
-the attachment to substrate was resupinate
-and its cap surface shape is irregular

To confirm or deny this is G. resinaceum, the next step is to measure basidiospores.

I think those ones from Missouri are interesting because I have not seen glossy ganoderma anywhere else with such large orbicular shaped caps. They seem to display some unique behavior in St. Louis, and i have been curious to examine herbarium samples.

By: Danny Newman (myxomop)
2012-09-11 14:48:56 PDT (-0700)

add excalamation points to the beginning and end of a link to an image (something ending in .jpg, .gif, .bmp, ect.). that puts an image anywhere on the site where text can be entered. check out the Textile Markup System [http://mushroomobserver.org/observer/textile] for more tips, located immediately beneath the comment entry field.

You do not need your own sequencing lab to obtain a better name for this than G. lucidum. Neither do you necessarily need this to be sequenced by someone else. That tree is meant to demonstrate that the name you’re using has had a rich history of routine misuse and over-application to somewhat similar looking species across all countries and continents where laccate Ganoderma reside. The outstanding article linked by Daniel (http://tinyurl.com/ganoderma-wang-et-al-2012) not only reiterates this, but indeed demonstrates that the Chinese G. lucidum is now conspecific with G. sichuanense. The “true” G. lucidum, having been described from English material, may be an exclusively European species, though no NA material was sampled for comparison to what we call G. lucidum ourselves (to say nothing of our other laccate Ganoderma species).

Given the rate at which North American fungi with European names are being redescribed as unique taxa, I think we can expect our own laccate Ganoderma to undergo a similar overhaul sometime in the not so distant future. In the meantime, we’re in a unique position to name things anticipatorily given what we know about the latest findings in this group, and that requires neither lab nor lab tech. Just a brain and a keyboard.

What was Ganoderma lucidum
By: Daniel B. Wheeler (Tuberale)
2012-09-11 10:34:06 PDT (-0700)


now appears to be Ganoderma sichuanense. At least, since May 2012. Mostly that material which was identified as Ganoderma lucidum, Ling Zhi, Ling Chih, or Lingzhi from China.

That’s pretty cool …
By: Patrick Harvey (pg_harvey)
2012-09-11 07:56:34 PDT (-0700)

I didn’t know you could include images in comments.

Not having access to a sequencing lab, I’m perfectly content with G. lucidum


By: Danny Newman (myxomop)
2012-09-10 17:38:30 PDT (-0700)

“Thirty-seven Ganoderma strains included in this study were grouped into at least six monophyletic groups. Ganoderma lucidum, the most cosmopolitan member of Ganoderma, was polyphyletic according to geographical origins.”

from: Hong, Soon Gyu and Jung, Hack Sung. “Phylogenetic Analysis of Ganoderma Based on Nearly Complete Mitochondrial Small-Subunit Ribosomal DNA Sequences.” Mycologia 96.4 (2004): pp. 742-755.

By: Danny Newman (myxomop)
2012-09-10 17:11:49 PDT (-0700)

has a point. No hymenium, no telling precisely what this is. Weather can temporarily “varnish” some otherwise un-shiny polypores. I’ve continued to wonder whether or not the true G. lucidum is even represented in NA (Dr. Desjardin seems to think not), and, accordingly, what varnished Ganoderma there are confirmed NA reports of outside of G. tsugae, G. oregonense and G. curtisii.

In the case of this observation, Ganoderma is a possibility, not an absolute certainty. Not without more notes and/or photography.

edit: the link to the earlier ob makes a more compelling argument for Ganoderma than this observation on its own.

By: Patrick Harvey (pg_harvey)
2012-09-10 17:10:57 PDT (-0700)

This was growing under the same tree as http://mushroomobserver.org/75312
Growing from the ground under the tree. There are white pores (4 to 5 per mm.) underneath at the edge of the cap, but the flesh surrounding the central stalk has soil incorporated with it so is very dark.

I have also personally seen a G. lucidum growing from the base of a tree which was over 18 inches across. Most descriptions of oyster mushrooms give a maximum size of 6 inches — I have seen them grow to almost 12, so published descriptions are not infallible.

Really need photo of pores as well.
By: Daniel B. Wheeler (Tuberale)
2012-09-10 14:34:01 PDT (-0700)

This obs. does not look like Ganoderma, pg. While there is some appearance of shellac on the surface, that could also be explained by abundant rainfall. Just as a curiosity, is this really as large as it looks? If over 12 inches diameter, it would be another reason to doubt Ganoderma lucidum.

There are Ganoderma which reach 20 or more inches across in my area: specifically Ganoderma applanatum. This is not that species.

According to Smith, Smith & Weber in “How to Know the Non-Gilled Mushrooms” Ganoderma is characterized by “…surface of pileus shiny (appearing varnished) or dull and custlike; spores colored in mass (rusty brown to brown), truncate, typically ornamented; setae, cystidia, and clamp connections absent.” In addition to varnished, the cap has been called “flat” and “kidney-shaped” by Gary Lincoff in Audubon Society Field Guide to North American Mushrooms. The surface is often compared to Japanese lacquerware: bright red and glossy, although the abundance of spores produced often cover and dull the surface. A single Ganoderma can produce millions or even billions of spores during a growing season.

Created: 2012-09-09 14:50:06 PDT (-0700)
Last modified: 2014-12-09 06:03:00 PST (-0800)
Viewed: 279 times, last viewed: 2017-06-13 23:04:22 PDT (-0700)
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