Observation 109324: Poria mutans

When: 2012-09-08

Seen at: Ledge County Park, Wisconsin, USA [Click for map]

Who: Andrew Khitsun (Andrew)

No specimen available

Proposed Names

47% (2)
Eye3 Eyes3
Recognized by sight
28% (1)
Used references: nom. inval. according to MycoBank due to a naming mistake, though it was Gilbertson and Ryvarden’s opinion that it belonged in this genus.

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Eye3 = Observer’s choice
Eyes3 = Current consensus


Add Comment
By: Danny Newman (myxomop)
2012-09-10 23:26:38 CDT (-0500)

MycoBank cites a publication error that would appear to invalidate this name. IndexFungorum does not reflect this (though they’ve been known to make an oversight or two before). Ugly though it may be, it looks like it’s back to Poria mutans.

i’ll leave H. mutans up just in case. good sleuthing, Andrew.

OK, but how do you know which name “wins”?
By: Andrew Khitsun (Andrew)
2012-09-10 23:04:07 CDT (-0500)

Is it always the newer name? I was surprised this turned out to be Hapalopilus. Usually that genus has fungi forming shelves, not just resupinate. Besides, this takes us further away from Ceriporia group…
And Mycobank considers Hapalopilus mutans invalid name. Can’t they just settle on one or another?

when in doubt
By: Danny Newman (myxomop)
2012-09-10 22:18:13 CDT (-0500)
MO didn’t recognize Poria mutans name, and didn’t offer alternatives
By: Andrew Khitsun (Andrew)
2012-09-10 21:57:03 CDT (-0500)

So I created it anyway – it seems like a legitimate name according to several sources.

I just double-checked with KOH again, even though it’s hard on drying specimen
By: Andrew Khitsun (Andrew)
2012-09-10 21:50:53 CDT (-0500)

It shows red right there – I guess it makes it Poria mutans then.

I tried KOH when it was fresh
By: Andrew Khitsun (Andrew)
2012-09-10 21:37:47 CDT (-0500)

It turned red on exposed flesh, and reddish on the surface, although I was concerned it wasn’t because of chemical reaction but because I was poking it with my KOH KOH-I-NOOR :-)

Mykobank says KOH should solve the dilemma
By: damon brunette (damonbrunette)
2012-09-10 21:21:51 CDT (-0500)

I find C spissa often and have not thought to examine the shades of red. Though now that you brought to attention will look at this. The descriptions on Mykoybank point out a few of the differences…

By: damon brunette (damonbrunette)
2012-09-10 21:16:33 CDT (-0500)

; associated with a soft white rot. In the field this could be confused with Poria spissa, but that differs in having simple-septate hyphae and allantoid spores. This species causes a trunk infection of black cherry according to Davidson and Campbell, see Phytopathology 33:965-985. 1943.

I wonder if anyone knows this group well.
By: Andrew Khitsun (Andrew)
2012-09-10 19:50:54 CDT (-0500)

Audubon Field Guide says this species is supposed to bruise or dry dark brownish-red, but another species – Poria mutans is supposed to bruise/dry reddish (and grow on chestnut). While I can’t account for the species of the tree this log belonged to, the fungus bruised red – to my eye, anyway. However, I’d like to see the difference between “reddish”, “red” and “dark brownish-red” with my own eyes to be able to figure it out.

Created: 2012-09-10 19:39:13 CDT (-0500)
Last modified: 2012-09-10 23:28:39 CDT (-0500)
Viewed: 118 times, last viewed: 2017-09-05 09:27:51 CDT (-0500)
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