Observation 15212: Tylopilus P. Karst.

These are a new one for me. They don’t seem to key out in for California Tylopilus species or any in the Bessette book.
The caps are up to about 14.2 cm broad. the color of the caps varies from a dull yellowish tan to brown with occasional hints of lilac. The pores stain brown as it appears other parts also exhibit some browning also. The spore print is reddish brown and the spores are subfusiform and are approx. 9.0-10.0 X 2.9-3.4 microns.The taste was not bitter. A thin but distinct reticulation covers the upper half of the stipe. They were found growing primarily under madrone but there was one live oak nearby.
After reviewing the Mykoweb site and the guttulate spores, I’m now comfortable with the Tylopilus indecisus id. Have added a new photo of another specimen from the same site and a photo of the spores. While they may be a little on the lower end of the size range, they are in the area, certainly within my range of measurement error.


Proposed Names

41% (4)
Recognized by sight
17% (2)
Recognized by sight
29% (4)
Recognized by sight
Based on microscopic features: Spore size seems OK to me.

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Tylopilus sp.
By: Michael Wood (mykoweb)
2008-12-12 11:22:57 EST (-0500)

The reticulate stipe and the spore size would seem to preclude Tylopilus ammiratii for this collection. Tylopilus indecisus has a reticulate stipe, but again the spore size is wrong.

I have only collected T. ammiratii under Quercus kellogii in the Sierra foothills.

By: Douglas Smith (douglas)
2008-12-11 20:55:05 EST (-0500)

Did these taste bitter or mild?

You might want to get in touch with Else about these. At the Oakland Fair she introduced me to a new Tylopilus guy, and he told me, “Yes, I am a Tylopilus guy”. Except now I go and forget his name, it would be good to pass these under his nose.