Observation 99385: Ganoderma curtisii (Berk.) Murrill

5 soft (looking) white fingers (all actually hard) spreading to fans in neighbors yard. Suspect house to be new, yard recently turfed. Fruit bodies probably growing on decaying tree root just under sod. The weather has been hot and dry for several weeks, although some rain has kept the yards from turning brown. Polypore broke off with a distinct snap – further evidence that it was attached to wood. Slice shows rings representing (different days?) intermittent growth. This has been in full sun most of the last week, but has not shown any varnish, except on the stem.

Ten days later varnish has begun to form, covered with light bloom. Stems are shiny dark red near ground surface. Tan surface is cracking in the sunshine – filling with white liquid that hardens.

I wanted to mention that this is the first time I have seen Ganoderma coming up white or nearly white. It has been the same in three distinct places in the neighborhood. It may have been that I did not see them in past years until later in the season – or that more dead wood is available this year – or that they had ideal conditions while they were starting up. I can get some spores easily and scope them….,

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Your first photo now
By: Daniel B. Wheeler (Tuberale)
2012-07-19 02:31:30 CDT (-0400)

shows that exudate pretty well.

But I would appreciate getting another photo if possible. Could you score a small but deep cut near the growing edge of the fungus, and photograph the results? I’m wondering if the response you have photographed is due to any damage, or just cracking from dehydration or rapid growth. An intentional wound would solve that question.

This is the very first time I have ever heard of a Ganoderma having an exudate from a sporocarp. GREAT observation!

Just had a big rain -
By: Martin Livezey (MLivezey)
2012-07-18 19:04:12 CDT (-0400)

a 1" cloud burst. What I saw was this: The cracks in the varnish surface appeared to be filling in with – as you say white exudate or latex. Not big drops like you might see on the underside of a polypore, just tiny oozing that will probably skin over and change color over time to resemble the rest of the surface.
I am intrigued that you think this is unusual – I have see the surface ‘melt’ in apparent response to the hot sun other years.


And the lacquer surface itself seems formed in a similar way from a relatively rough and porous fruit body. They are still down there – would you like a better close up?

By: Daniel B. Wheeler (Tuberale)
2012-07-18 13:59:51 CDT (-0400)

white liquid? Exudate? First time I have heard of this, and possibly an important observation because of that. Can you document? Are any sporocarps still producing that liquid?

While scientific holotype may be European,
By: Daniel B. Wheeler (Tuberale)
2012-07-18 13:44:44 CDT (-0400)

use in China and Japan predates Linaeus.

Gilbertson R. & Ryvarden L. 1986. North American Polypores: Vol. I & II. FungiFlora, Oslo, Norway. The Mushrooms Cultivator by Jeff Chilton and Paul Stamets. Growing Gourmet and Medicinal Mushrooms, by Paul Stamets. Christopher Hobbs book on medicinal fungi may have also had some references.

I completely agree with your assessment of which Ganoderma collection comes (came?) first. Historica documentation in China proves Ganoderma lucidum, (aka Reishi, Ling Zhi, Ling Chi, Herb of Immortality, et al) predate European exploration of fungi.

Gilbertson & Ryvarden tried to sort the Ganoderma by what they were growing from. While an admirable suggestion, I’m not certain that works completely. Having grown a few Ganoderma myself.

Hi Daniel,
By: ndoll
2012-07-17 16:41:41 CDT (-0400)

It is my understanding that the Holotype for Ganoderma lucidum was collected in Europe – not Asia. Also, the Holotype for G. lucidum was lost, and all that remains of said Holotype are some antique botanical illustrations. Thus, those illustrations currently represent the Holotype for G. lucidum. And until taxonomists untangle the taxonomic confusion within the genus Ganoderma, a Paratype can not be chosen to replace it. Note: I referenced that info from the monograph by Solomon P. Wasser (published 2006) on the pages about the taxonomic history of Ganoderma.

Where did you find information about an “Original collection of G. lucidum on plum (Prunus) from China”?

Note, for scientists to identify glossy Ganoderma with accuracy it requires proper herbarium samples. Direct examination of the material is required, its micro and macroscopic features.

Just saw the other photos.
By: Daniel B. Wheeler (Tuberale)
2012-07-07 13:01:45 CDT (-0400)

Eccentric stipe shown on other sporocarps. G. curtisii I think more likely in your area.

For sure Polypore.
By: Daniel B. Wheeler (Tuberale)
2012-07-07 13:00:31 CDT (-0400)

And your guess it is growing from buried rotting roots is a good one. Wood-rotting fungi underground would have little problem accumulating enough water to fruit now. And it is the right time of the year for Ganoderma to start showing up.

I’m suspicious about your description of “soft white fingers” though. Having grown one or two Ganoderma, mine were never “soft white fingers”, although they were relatively soft compared to mature Ganodermas. Other obs. on MO for Ganoderma curtisii show a strongly off-center red-shellac stipe, even though the surface usually has a lot of yellow in it.

Original collection of G. lucidum on plum (Prunus) from China. While G. lucidum may occur in U.S., more likely if it is fruiting from a mushroom “garden”.

Maybe Ganoderma curtisii?
By: Britney Ramsey (Riverdweller)
2012-07-07 12:42:28 CDT (-0400)

Created: 2012-07-07 12:35:47 CDT (-0400)
Last modified: 2012-07-18 21:11:54 CDT (-0400)
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