This is probably a
Boletus smithii
Note: taste is not bitter -- The taste is very mild
Spore print is Olive Brown
Spores are oblong or spindle shaped 4.5 microns to 11 to 14 microns
Scroll down to see a spore print and pictures of the spores
click below to see some references of Boletus smithii
Click here for first reference
Click here for second reference
Click here for third reference
It is not Chalciporus piperatoides - spores not red
Click Here to see a description of Chalciporus piperatoides in mykoweb.com
Scroll Down for more Pictures
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Here is what Paul and I found
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The Stem is definitely Red-ish
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It stains Blue Green
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This shows it cut
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The Stem is Yellow when cut
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Here is the bottom of the stem
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Here is a spore print
I would say it is Olive Brown
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The spores are oblong or spindle shapped
They measure 4.5 by 11 to 14 microns
Click on a Thumbnail to enlarge the image