Observation 119409: Postia tephroleuca (Fr.) Jülich
When: 2009-09-13
No herbarium specimen

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Eye3 = Observer’s choice
Eyes3 = Current consensus


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Postia tephroleuca
By: Irene Andersson (irenea)
2012-12-09 08:21:39 PST (-0800)

has a circumpolar distribution, so your colleague is probably right.
Tyromyces kmetii is a small orange-coloured species, which can fade to white, but in that case without any greyish hue.

Postia tephroleuca was just proposed…
By: Andrew Khitsun (Andrew)
2012-12-09 07:58:57 PST (-0800)

Again, it appears to be an European species. On the other hand, a colleague of mine claims to have found it in Wiscosnin (and he is more experienced than me) -see this link: http://www.wisconsinmushrooms.com/Postiatephroleuca.html (full disclosure: the site is mine, but the photo and ID are from my colleague)
Also, according to Wikipedia, there are whole load of synonyms for that name:

Bjerkandera adusta f. cinerata
Bjerkandera cinerata
Bjerkandera melina
Bjerkandera simulans
Boletus tephroleucus
Leptoporus tephroleucus
Oligoporus tephroleucus
Piptoporus elatinus
Polyporus elatinus
Polyporus linearisporus
Polyporus melinus
Polyporus tephroleucus
Polyporus tokyoensis
Polystictus tephroleucus
Spongiporus tephroleucus
Tyromyces elatinus
Tyromyces melinus
Tyromyces tephroleucus

Which tells me that without actual specimen, this one will probably always be a tentative something, but never a certain anything. This photo is 3 years old, so there is no way to check out the fruitbody. These days, I try to pick specimen and save them, even dry, and see if something can be gotten out of them ID-wise.

By: Andreas (AK_CCM)
2012-12-09 04:33:19 PST (-0800)

you could check, if the pileus changes its color with 5% KOH? T. kmetii turns to orange-reddish. You’re good to be sceptical because T. kmetii is only an assumption.

I’m not sure about this ID.
By: Andrew Khitsun (Andrew)
2012-12-08 17:25:26 PST (-0800)

If I remember correctly, the mushroom was thin, soft and somewhat watery. Name T.kmetii was just proposed. I’ve never heard of such species – it appears to be European. Not that we don’t share species with the Old World, but every website I’m finding this mushroom at is European, with no American references. Unless someone points me to an American source – I’m sceptical.

Created: 2012-12-08 17:05:14 PST (-0800)
Last modified: 2012-12-09 08:28:31 PST (-0800)
Viewed: 132 times, last viewed: 2016-10-25 14:14:18 PDT (-0700)
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