Observation 223327: Polyporales sensu lato

When: 2015-11-13

Collection location: Tallassee Highlands, Clarke Co., Georgia, USA [Click for map]

Who: Bill Sheehan (B_Sheehan)

No specimen available


I was struck with how much this polypore looked like bright white paint. It coated one side of a standing dead water oak (Quercus nigra). Lacteus irpex comes to mind, but I’ve never seen it coating the side of a standing tree as smoothly as this. It was interesting how the fungus coated both bare wood and rougher bark without missing a beat.

UPDATE: i revisited the tree and added more images. In late December 2015 the fungus was still robust. By late February 2016 the fungus had almost disappeared.

Species Lists


2016-02-20 17.11.56.jpg

Proposed Names

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= Observer’s choice
= Current consensus


Add Comment
Of course
By: Danny Newman (myxomop)
2016-04-14 19:35:00 PDT (-0700)

Whiteness, lignicolousness, and a corticioid habit. There are no other fungi that share these three characteristics in a single fruiting body. Bring in any polyporologist, they will agree. 10 points to Alain!

Good idea, but no dice
By: Jason Hollinger (jason)
2016-04-14 10:28:09 PDT (-0700)

Not with those teeth, no way it’s a lichen, sorry!

Thanks Danny
By: Bill Sheehan (B_Sheehan)
2015-11-19 18:42:32 PST (-0800)

for the detailed assessment of polypore identification resources and challenges!

We are improverished,
By: Danny Newman (myxomop)
2015-11-19 16:37:12 PST (-0800)

here in North America, when it comes to polypore literature, expertise and information. There are two books I know of which should rest on any prospective polyporologist’s shelf, and they are Poroid Fungi of Europe and Fungi Europaei 10: Polyporaceae s.l., respectively. You’ll notice that both are specific to a continent which is not ours. This has been a problem for decades. Gilbertson and Ryvarden’s North American Polypores is out of print, rare, expensive, taxonomically outdated and without color photographs. There is great hope that Ryvarden will put out a companion book to his Poroid Fungi of Europe for North America before he retires, but nothing has been promised.

I would call the growth form seen here “antroidioid,” but there are other genera which exhibit the same “stacked, shallow, shelves of pores” look, such as Oxyporus and Schizopora. Acknowledging my overall inexperience with these fungi, I do know that microscopy often plays a critical role in the identification process. Another disadvantage to working with any polypores, North American or otherwise, is their difficulty under the microscope. Spores can be barely- to non-existent in seemingly fresh material, and differentiating between and among hyphae types is not always easy.

That said, if you can collect some material and have a polypore-savvy person examine it, and that material is feature-rich enough to make and ID with what little literature on North American polypores we have, you may someday get a name for this. Then again, maybe I’m painting a much bleaker picture of North American polypore taxonomy than I should, and someone other than me has an easy name for this given the available information.

Antrodia albida?
By: Bill Sheehan (B_Sheehan)
2015-11-19 10:39:44 PST (-0800)

Wikipedia says only A. albida, which is of course white, is found on hardwoods.

Created: 2015-11-18 17:14:21 PST (-0800)
Last modified: 2016-04-20 11:19:23 PDT (-0700)
Viewed: 191 times, last viewed: 2019-05-22 23:20:45 PDT (-0700)
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