Observation 79779: Poria sensu lato

When: 2011-09-24

Collection location: Camp Sequanota, Somerset Co., Pennsylvania, USA [Click for map]

Who: Martin Livezey (MLivezey)

No specimen available

Big crust on standing hardwood in wet location. Pale pink-brown spores deposited on white crust. Angular pore openings.

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I have no photo
By: Irene Andersson (irenea)
2012-01-06 22:48:26 CET (+0100)

of Oxyporus corticola, but there are plenty on the web and here on MO..

Darn, I had forgotten about latemarginatus, it looks even better..!
If you get an opportunity to check this in the microscope, Oxyporus has characteristic cystidia with something like crystals on the top.

But it really resembles orange spore powder on the pore layer. I wonder if it could be conidia, but I don’t know which polypores that can have them (I haven’t seen it described in Oxyporus). If it is conidia, they are produced on the upper side or in the context, not dropped from the pores. Anyway, it should be easy to find out what it is in the microscope (or what it’s not..).

By: Martin Livezey (MLivezey)
2012-01-06 18:55:10 CET (+0100)

I have not seen Oxyporus corticola in the states in the short time I have been looking. This looks cool!


There are only 3 observations of it on MO; it looks like the fruitbody is often small. Part of what I like about the Antrodia if we can agree on that term for the moment is that it can come in large sheets. Do you have a photo of O. corticola you can post?

By: Martin Livezey (MLivezey)
2012-01-06 18:50:41 CET (+0100)

You have a good point about the color of the fruit body and my suggestion that it may be coming from the spores. I know you have seen this one


In 82838 it clearly looks to me that the spores are piling up on surfaces below the pores…, I thought the one shown here might be similar, although I admit, there don’t seem to be any piles here.

You have a lot of the usual reasons for not liking these guys, but you have more ID’s on resupinate fungi than anyone I have seen on MO. You must like something about them!

Yes, they are so intriguing,
By: Gerhard Koller (Gerhard)
2012-01-06 16:43:15 CET (+0100)

and I do not like to look at them for some reasons:
firstly, those binding hyphae in di- or trimitic species are so strong that one cannot discern the generative hyphae because of the clamp stories
secondly, ten months of the year those critters are not sporulating
thirdly, too many resupinate ones that all look alike
as well as a few other things.
You have to be kinda masochistic to deal with polypores :)

A longshot..
By: Irene Andersson (irenea)
2012-01-06 16:11:13 CET (+0100)

Maybe the extreme form of Oxyporus corticola (sometimes named ravidus)?
But there are soo many others…
I find them difficult to deal with in the microscope, but it’s always worth a try to look at spores and cystidia to start with.

Are you sure about spore deposit?
By: Gerhard Koller (Gerhard)
2012-01-06 10:57:46 CET (+0100)

Could this pink color not belong to the fruitbody itself?
If it’s soft and juicy do also consider the other genera and many more…

soft, brittle, waxy
By: Martin Livezey (MLivezey)
2012-01-06 02:40:19 CET (+0100)

I believe it changes from a nearly featureless expanse of corticoid membrane into gently sagging pores to what Danny calls these horse hooves. and the spores pile up on the surfaces below. I will collect some next time and maybe I can send you some.

I cannot help you in ID-ing this, although I would like to,
By: Gerhard Koller (Gerhard)
2012-01-06 01:51:46 CET (+0100)

it can be a whole heck of genera. And the next thing is I am from Europe and not America where the funga is considerably different though I admit I have been over there and know some. Maybe you should also look for Postia/Oligoporus/Tyromyces with this? How is the consistency of the context? Is it hard, corky, fibrous or is it soft, brittle, waxy?

Not albida,
By: Gerhard Koller (Gerhard)
2012-01-01 23:25:34 CET (+0100)

but Antrodia is most probably the correct genus. In Europe many Antrodia species grow on hardwood, e.g. malicola, macra, macrospora and so on …

Thanks myxomop, this is a new name to me.
By: Martin Livezey (MLivezey)
2011-10-18 19:11:28 CEST (+0200)

A quick search identifies Antrodia albida the only one in 50 species that occurs on hardwood. There appears to be paucity of information and images on the web, but maybe I need to dig a little deeper. Thanks again.