Observation 25250: Laetiporus Murrill

When: 2009-09-14

Collection location: Sitka, Alaska, USA [Click for map]

Who: Kitty LaBounty (kitty labounty)

Specimen available

This fungus doesn’t exactly fit Laetiporus conifericola, the better fit by color is L. cinncinatus which doesn’t occur in western North America.

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


Proposed Names

6% (4)
Recognized by sight: White pore layer, salmon pink upper surface
51% (3)
Recognized by sight: white pore surface.
55% (1)
Recognized by sight: unusual form in unusual place on an unusual host tree. let’s leave the specific open for more data. did you keep that specimen, Kitty?

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= Observer’s choice
= Current consensus


Add Comment
By: Kitty LaBounty (kitty labounty)
2009-09-24 14:16:48 CDT (-0400)

Thanks for the comments. This Laetiporus is the first I’ve seen in southeastern Alaska with distinctly white pores and a rather pink/orange upper surface. The clustered/clumped growth form was also rather unique. It was growing on mostly buried wood that wasn’t terribly distinctive (and it was the end of a long day). There were Sitka spruce, Western hemlock and Red alder in the immediate area and unfortunately I can’t be certain of the identity of the wood. I do have a piece of the fungus (dried)to examine further if that would be of any use and gps coordinates, so I can possibly return to the site (just a floatplane ride away).

original reference
By: Tom Volk (TomVolk)
2009-09-18 20:38:12 CDT (-0400)

According to the original refeence the pore color is pale yellow to bright yellow. Harvard Papers in Botany, Vol. 6, NO. 1, 2001, pp. 43-55. Available online at http://www.fpl.fs.fed.us/documnts/pdf2001/burds01a.pdf

Pore surface can bleach out, at least here in Oregon.
By: Daniel B. Wheeler (Tuberale)
2009-09-16 20:44:40 CDT (-0400)

While yellow is the predominant coloration of the pore surface, I have seen very old specimens that are nearly white. In this observation the pore surface looks more pinkish, to me, though.

Pore color is a poor color!
By: Darvin DeShazer (darv)
2009-09-16 01:09:18 CDT (-0400)

White pores? L. conifericola has bright yellow pores. Laetiporus cincinnatus is the species with white pores, but it grows on Oak in Eastern USA.

If growing on conifer
By: Daniel B. Wheeler (Tuberale)
2009-09-15 18:16:52 CDT (-0400)

probably L. conifericola, at least as currently understood in science. I tried to grow what was then described as L. sulphureus on Douglas-fir locally, back in 1994-1996 – nothing grew. Then learned that L. conifericola was specific to conifers here in Oregon and Washington (and probably Alaska, British Columbia, and California). So if you found it growing on Western hemlock, Sitka spruce, Douglas fir it is likely L. conifericola. Seems to be rarely photographed to date, and I would suspect there could be some variations that might be species-specific.