Observation 10259: Ganoderma P. Karst.

When: 2008-08-31

Collection location: Hershey, Pennsylvania, USA [Click for map]

Who: James V. Gallagher IV (lbjvg)

No specimen available

Located about 2 feet up from the ground on a splintered tree trunk. I ‘tagged’ it as part of the id process.

Update: photos 19497-19511 taken 3 days later. Bruising has faded almost completely.


New images 2 days later. The image i scraped with the back of my thumbnail is very much faded.
New images 2 days later. The image i scraped with the back of my thumbnail is very much faded.
New images 2 days later. The image i scraped with the back of my thumbnail is very much faded.

Proposed Names

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Eye3 = Observer’s choice
Eyes3 = Current consensus


Add Comment
By: Erlon (Herbert Baker)
2015-02-22 19:03:56 CST (-0500)

However, there is also G. brownnii to consider for some western collections. The darkness of the staining can vary depending on the dryness and age of the specimen. There is some appreciable staining in this collection. You can preserve the staining/etching on the pore surface of the artist conk by drying it out. Collections labeled G. annulare from California may be unique , or perhaps just forms of G. brownii.

Edit* I didn’t see Matt had already responded. I have seen genetic evidence for a distinct lineage in north America. I’ll try to find the tree, or make another one, shortly.

By: Matthew Schink (MSchink)
2015-02-22 18:56:17 CST (-0500)

G.megaloma can apparently be distinguished from European specimens of G.applanatum by the presence of a wide sterile margin that surrounds the pores the color may vary as well. I am very interested to see how the DNA turns out in comparison to the European species.They are obviously closely related. At this point I am mostly calling it G.applanatum sensu lato.

I am not sure that G.australe was ever a proper name to use in most of North America, and I don’t think the name is appropriate in Europe either. G.adspersum is the appropriate name, When one compares G.australe sequences on Genbank you will notice, paying attention to where in the world the DNA comes from that European and southern hemisphere collections group into two distinct clades. G.adspersum sequences match G “australe” sequences from Europe. G.adspersum was a name described for European specimens while G.australe was described I believe from Australasia.

does that make it
By: Danny Newman (myxomop)
2015-02-22 17:41:01 CST (-0500)

the functional replacement name for those things formerly referred to as G. australe and G. applanatum in North America? What about the lack of deep brown staining reported by Darv? That is perhaps the most deadringer of features for this group.

Ganoderma megaloma
By: Erlon (Herbert Baker)
2015-02-22 15:02:05 CST (-0500)

Of the three species names presented G. megaloma is the only one described from north america. Speciation due to geographic isolation.

By: Danny Newman (myxomop)
2015-02-22 14:25:43 CST (-0500)

what is your reasoning for G. megaloma? for that matter, what is G. megaloma?

You rock Darv!
By: James V. Gallagher IV (lbjvg)
2008-10-11 18:33:17 CDT (-0400)

Thanks for your interest and research on this.

Ganoderma australe in USA
By: Darvin DeShazer (darv)
2008-10-11 18:13:39 CDT (-0400)

I keep returning to this conk and try in vein to key it out and this time it came out very close to Dr. Volk’s opinion. In fact some texts list them as varieties of each other. With photos, it easily ends up at Ganoderma australe which is pictured in many european books and on Google. With dichotomous keys it seems to either go in circles or dead end with the request of microscopic data.

Then I bumped into a site that’s got a large collection of polypores by Dr. Josef Vlasák, Hluboká and Vltavou of the Czech Republic. Not only do they have many Ganodermas (109 of them), but they list one that Gilbertson & Ryvarden do NOT have in North America!

click on G-H Then click on Ganoderma australe. One collection is listed on Maple from TN and another on hardwood from PA. Two collections in herbaria.

Bernicchia, Annarosa. 2005. Polyporaceae s.l. Fungi Europaei Vol. 10. Edizioni Candusso, Alassio, Italy. 806p.

Jordan, Michael. 2004. The Encyclopedia of Fungi of Britain and Europe. Frances Lincoln, London, UK. 384p.

Sopelas, P., Angelopoulos, A., Gonou-Zagou, Z., and Kapsanaki-Gotsi, E., 2000. Ganoderma australe (Fr.) Pat. a new pathogenic fungus of willow (Salix alba) in Greece. 22nd Congress of the Hellenic Society of Biological Sciences, 25-28 May, Skiathos, Greece. p. 275.

By: James V. Gallagher IV (lbjvg)
2008-09-09 23:43:40 CDT (-0400)

the bruise I scratched in was more of a grey mauve. It does seem to have had a hard life – there is a piece of what appears to be bark skewering it.

By: Tom Volk (TomVolk)
2008-09-09 23:25:16 CDT (-0400)

I would have trouble calling this anything but Ganoderma applanatum that has gone through some bad times in its life, being partially torn off the tree. It’s definitely not a Phellinus, which would have a red brown color in its pores. The only other possibility wouldbe some weird Perenniporia species, but none of those bruise brown

other possibilities?
By: James V. Gallagher IV (lbjvg)
2008-09-04 19:50:57 CDT (-0400)

I just obtained some new field guides. The National Audubon Society guide has some photos of thick woody polypores. Based on those images, I would guess it is a Phellinus sp. My guess is that the tree is an oak.

By: Darvin DeShazer (darv)
2008-09-02 23:13:59 CDT (-0400)

This does not appear to be a typical G. applanatum and maybe not even a Ganoderma at all. On the west coast they are almost always applanate, that is flattened out and looking like a frisbee stuck in the side of a tree. Every thick one I investigate turns out to be G. brownii. This one is a ‘chunky wedge shape’ without a thin margin. The pore surface is too rough, bumpy and has irregular holes in the hymenium. G. applanatum almost always has a smooth surface and is parallel to the ground. The bruising in the form of a capital I looks purplish on FULL SIZE. G. applanatum bruises a deep, rich chocolate brown color and days later fades to a beige. I have searched for a photo of a conk that does bruise this pale purplish brown and so far have failed to find one. So, I currently do not know what to call it, but based only on the photo, I would NEVER call it G. applanatum. I changed the ‘As if’ to ‘Doubtful’ until more info surfaces.

Ganoderma applanatum
By: James V. Gallagher IV (lbjvg)
2008-09-01 18:48:10 CDT (-0400)

Someone said ‘As if’. I am always skeptical of my own classifications, but I could not find any other bracket fungus with a hard white pore surface that you could write on (other than Ganoderma australe). Also the illustration in ‘Mushrooms Demystified’ shows Ganoderma applanatum with a similar (but thinner) woody fruiting body.

Anyway, I’m happy that Ganoderma applanatum is a reasonable classification based on the observation.

By: Tom Volk (TomVolk)
2008-09-01 18:02:01 CDT (-0400)

Ganoderma applanatum. IThe fruiting body has probably undergone trama in its past to become so irregular.

Created: 2008-08-31 15:46:32 CDT (-0400)
Last modified: 2015-02-22 20:35:12 CST (-0500)
Viewed: 239 times, last viewed: 2017-06-05 02:35:35 CDT (-0400)
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