Observation 221773: Phaeolus schweinitzii (Fr.) Pat.
When: 2015-10-21
No herbarium specimen
0 Sequences

Phaeolus schweinitzii, or the cow pie fungus, is a root parasite of conifers and causes a dark brown cubical rot. The young fruiting bodies are mustard yellow and vibrant, turning a chocolatey maroon with maturity, and then eventually into a pile of burned cookies. Look for spruces with bottle butt and resinosis!

The first three pictures are from a Douglas-fir, Tanoak, and Madrone forest in Humboldt County and the last one is from Redwood City, California.


A young fruiting body. You can see why it is used as a dye!
An older fruiting body
A look at the pore layer
And a really old fruiting body (emerging from the roots of a fallen conifer)

Proposed Names

79% (1)
Eye3 Eyes3
Recognized by sight
Based on chemical features: Turns black with KOH

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Eye3 = Observer’s choice
Eyes3 = Current consensus


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Created: 2015-11-04 19:46:21 CST (-0500)
Last modified: 2015-11-04 19:46:27 CST (-0500)
Viewed: 9 times, last viewed: 2017-06-21 03:32:16 CDT (-0400)
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