Observation 54134: Ganoderma applanatum (Pers.) Pat.
When: 2010-09-30
No herbarium specimen

Notes: A cluster of up to 10 inch in diameter shelves was found on a dead log. The underside of the specimen in photo 1 is shown in photos 2 and 3. The white pores are tiny and have relatively thick walls. The white pore surface convers only part of the underside. Photo 4 is of part of the underside of a different specimen from the same cluster. Under very high magnification the brown area has a maze-gill pattern. The mosaic cluster is one of several on this specimen. Is it a parasitic fungus? A lichen? Help will be appreciated. Can anyone identify the polypore?

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Sporophagomyces chrysostomus
By: walt sturgeon (Mycowalt)
2010-10-01 19:54:53 CDT (-0400)

A wild guess! Hypomyces chrysostomus


John Plischke may be able to nail this one. He showed me something similar at tis year’s NEMF Ristich Foray.

Looks like some kind of mold
By: Jason Hollinger (jason)
2010-10-01 17:09:30 CDT (-0400)

I imagine even decomposers need to be decomposed, and there’s a fair amount of “meat” on a perennial conk like this. Doesn’t look like a lichen to me. There are a few species of crustose lichens that you can often find on the old upper surfaces of conks, like Caloplaca holocarpa and Lecanora spp., but the fuzziness on yours is a moldy thing, not a licheny thing.

What are the underside patches on some of these specimens?
By: Bob Zuberbuhler (Bob Z)
2010-10-01 16:29:00 CDT (-0400)

I’m sure Mycowalt is correct and this is Ganoderma applanatum. I revisited the site today and saw about 20 large shelves on this one log. All but three had a white underside with tiny white pores and seemed to be typical G. applanatum. The exceptions looked old and unhealthy. The color of the top of the shelf was faded and the attachment to the log was weak. The underside of each was dark brown and with high magnification there were tiny brown pores. (In some areas there seemed to be a maze-like pattern). Each of the three shelves had grayish blue patches on the underside. One was a mosaic pattern and is pictured in Photo 4. I’ve added photo 5 today, and it shows a much thinner crust-like patch with thin threads leading from the patch. Are these three old decaying shelves that have picked up an “infection” of another fungus or a lichen, or did the “infection” cause the senescence? Would appreciate help.

Created: 2010-09-30 14:09:11 CDT (-0400)
Last modified: 2015-03-23 13:00:13 CDT (-0400)
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