Observation 196534: Ganoderma sessile Murrill

When: 2014-09-06

Collection location: Millennium Park, Creve Coeur, Missouri, USA [Click for map]

Who: Judi T. (AvidAmateur)

Specimen available

Several small specimens fruiting on decaying log, possibly Oak.


Copyright © 2014 jathomas
Copyright © 2014 jathomas
Copyright © 2014 jathomas

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Eye3 = Observer’s choice
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By: Matthew Schink (MSchink)
2015-11-03 21:42:04 CET (+0100)

Is European, originally described outside of London England. Its range extends throughout temperate Europe with some extension into China based on DNA studies.

The primary cultivated species in China is Ganoderma lingzhi which is closely related to the North American Ganoderma curtisii. G.lucidum sensu stricto is actually closer related to G.tsugae and G.oregonense than to the other Ganoderma varieties.

G.sessile is a member of the Ganoderma resinaceum complex. There are a few other resinaceum complex members in North America, G.sessiliforme which is smaller than G.sessile and has a lighter almost white flesh and smaller spores is one. G.resinaceum sensu stricto occurs in Europe.

Distinctions between species groups can be done with morphology. G.resinaceum complex will bleed a yellow resin when the white edge is stabbed or cut when young. And have a smooth type spore. G.curtisii will have dark hard resin like material in its context. As well as having rough spores. G.lucidum will have a context devoid of the resin material as well as having rough type spores. For an example of the difference between rough and smooth spores see my observation 220185.

G.sessile and G.curtisii are actually quite old names that later mycologists tossed out in favor of G.lucidum after ignoring morphological differences. But recent DNA is helping to clarify that the names were appropriate. Check out this study for more details. http://www.researchgate.net/...

Ganoderma lucidum
By: walt sturgeon (Mycowalt)
2015-11-03 20:29:21 CET (+0100)

Last I knew it is Asian and has been determined to not occur in North America. Stay tuned!

Thanks for update on name change.
By: Judi T. (AvidAmateur)
2015-01-17 20:49:06 CET (+0100)

Is the name change due to the European vs North American varieties or based on new information from DNA studies?

Created: 2015-01-17 19:40:15 CET (+0100)
Last modified: 2015-01-17 19:43:51 CET (+0100)
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