Observation 213193: Ganoderma martinicense Welti & Courtecuisse
When: 2015-08-18
Who: MSchink
No herbarium specimen

Notes: Previously I suspected this of being an undescribed species indigenous to Eastern Tennessee. Recent evidence suggest G.marinicense as the proper name for this specimen and several others like it.

Proposed Names

82% (1)
Eye3 Eyes3
Used references: The Ganodermataceae in the French West Indies,Fungal Diversity (2010)
Based on microscopic features: Cutis element shape and form.
55% (1)
Recognized by sight

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Eye3 = Observer’s choice
Eyes3 = Current consensus


Add Comment
By: GP Van Eron (reishiTea)
2015-08-19 10:45:29 CDT (-0400)

Terrific explanation. Perhaps very slight raise in yearly temps is allowing these guys to come North a bit, or perhaps it always been lurking around.

I’ve been mushroom hunting for a while but should really get more scientific about it. I would have called it G. Curtisii and had it sliced and boiled up without a second thought. Thanks

Very little
By: MSchink
2015-08-18 23:16:18 CDT (-0400)

To be honest, Especially with these specimens, which grow a pale yellow color similar to G.curtisii. The thing that struck me was their unusual growth form.

The similarities are color, pale yellow, with a deep reddish brown stipe, flesh color is tan/light brown with very prominent hard, shiny resinous bands. The spores that I observed had the same morphology though I did not check their precise measurements.

The differences are a usually centrally stipitate form, looking something like a funnel. The flesh seems to be much denser than G.curtisii and slightly darker in color. The cells of the cutis in curtisii are sort of club shaped, with a slightly enlarged round tip tapering to a thinner base. These ones are more uniform in thickness, baseball bat shaped with knoblike protrusions, making them look like clubs with spikes.This matches G.martinicense, Though other species also share this feature.

The odd thing out definitely has to be the location, Ganoderma martinicense is only known from the Caribbean, it was described in 2010 on the French island of Martinique. So what’s it doing in Tennessee? The DNA came back as a match for G.martinicense, so I compared it with the description, and it fits. I have several other collections that I suspect may be the same, but I want to wait until I have them sequenced, they have a paler flesh. I am leaving this observation as Ganoderma despite the DNA because its location is anomalous, and I think it warrants a closer look.

These are cultivated specimens, the original wild specimen was sent to a friend of mine who cultured it out. When we started to grow it we noticed some oddities in the way it was growing and how it developed its colors. Shades of grey and browns instead of yellows and reds.

Genetically though, G.martinicense is closer to G.multipileum, and G.curtisii is closer to G.lingzi (G.sichuanense depending on who you ask)

Ganoderma Curtisii differentiation
By: GP Van Eron (reishiTea)
2015-08-18 21:27:18 CDT (-0400)

What are the differentiating factors between this identified as Ganoderma martinicense and Ganoderma curtisii which from eye level only and approximate region I would think the same thing? Thank you!

Created: 2015-08-18 11:43:48 CDT (-0400)
Last modified: 2016-04-27 00:03:43 CDT (-0400)
Viewed: 76 times, last viewed: 2017-02-19 12:28:26 CST (-0500)
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