Observation 7617: Polyporus tubaeformis (P. Karst.) Ryvarden & Gilb.
When: 2008-05-29
Collection location: Sitka, Alaska, USA [Click for map]
No herbarium specimen

Notes: Growing on a rotting Red Alder. Looking for help in get this identifed.

[admin – Sat Aug 14 02:06:01 +0000 2010]: Changed location name from ‘Sitka, Alaska’ to ‘Sitka, Alaska, USA

Proposed Names

51% (3)
Recognized by sight: With the centrally stipitate fruiting body (with a darkening stipe)and the pores on the hymenium, it must be a Polyporus. It looks like it’s somewhat odd in shape— young and maybe drying out? The species is up to you. :)

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Eye3 = Observer’s choice
Eyes3 = Current consensus


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Thanks for suggestions
By: Matt Goff (gwark)
2008-05-30 12:08:13 MDT (-0600)

Thanks for the suggestions. There are small pores on the hymenium. A friend of mine collected one and said that it isn’t a Coltricia because there is no KOH reaction and the flesh is white.

There are no egg looking things in the cups, and I think the size is pretty large for Nidulariaceae, unless there are some that are much larger than I’ve ever noticed before.

Maybe Coltricia?
By: Douglas Smith (douglas)
2008-05-29 17:40:01 MDT (-0600)

These might be a polypore, but hard to say. Is the off-white surface on the outside there, the hymenium with pores? They might be of the genus Coltricia, but that is only a rough guess.

By: Alan Rockefeller (Alan Rockefeller)
2008-05-29 13:27:13 MDT (-0600)

Any sign of “eggs” in the bottom of the cups? If so this would be in the Nidulariaceae family.

Created: 2008-05-29 12:00:40 MDT (-0600)
Last modified: 2015-02-23 22:36:22 MST (-0700)
Viewed: 142 times, last viewed: 2016-10-22 00:27:46 MDT (-0600)
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