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Resupinate polypore on underside of oak on ground. Upper bark stained bright yellow from spores. Pores are gray (sometimes pink in photos), stained dark brown when log picked up. Margin at top of pore layer is bright yellow same shade as stained bark above. Another log with apparently the same polypore had brown shelf with white margin – a large and confusing change. Red-brown exudate noted on pores near soil surface.

Species Lists


ethereal light from above
Note bright yellow stains on bark at top
yellow spore deposits on protrusions below; Some areas of pores are pink
Dark shelf, white margin when mature
White rot or brown?
community architecture

Proposed Names

29% (1)
Recognized by sight
78% (2)
Recognized by sight

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Add Comment
By: Martin Livezey (MLivezey)
2013-12-08 18:30:17 PST (-0800)

It is a single species. I attached two more photos that I hope will be more convincing for your. I have a sample, so someday, I may be able to add microscopy.

having a hard time
By: Danny Newman (myxomop)
2013-12-04 19:45:30 PST (-0800)

seeing all this as a single species.

edit: these images:

make it a bit clearer. what an immensely variable species. either resupinate with these bulges of downwardly oriented, elongate, cream to gray to brown to black pores, or completely pileate with a yellow or whitish margin, with or without droplets of red exudate.

Thanks Noah
By: Martin Livezey (MLivezey)
2013-08-16 04:50:23 PDT (-0700)