Observation 73773: Porphyrellus porphyrosporus (Fr. & Hök) E.-J. Gilbert

When: 2011-08-10

Collection location: Southern St. Louis Co, Minnesota, USA [Click for map]

Who: Gene Kremer (GeneMN)

No specimen available

Large olive colored bolete on ground in aspen/fir woods10 cm high, cap 9 cm dark olive dry, pores olive brown and small, stipe 6 cm bulbous tapering down, flesh white, solid, slowly blueing then turned dark brown, taste mild, strong earthy odor. Spore print reddish brown [suggesting Tylopilus]



Proposed Names

31% (3)
Recognized by sight
-6% (3)
Used references: “North American Boletes” by Bessette-Roody-Bessette
23% (2)
Used references: Help here, David Aaron, MushroomExpert, other sources.
58% (2)
Recognized by sight: In the porphyrosporus group anyway… Large size, dark colors, growing with fir.

Please login to propose your own names and vote on existing names.

Eye3 = Observer’s choice
Eyes3 = Current consensus


Add Comment
This may be a confusion in nomenclature.
By: Anna Gerenday (AGerenday)
2011-11-10 08:50:11 PST (-0800)

I don’t believe Porphyrellus is used anymore as a valid genus ; its members would be in the genus Tylopilus.

Add’l Info
By: Gene Kremer (GeneMN)
2011-08-12 16:09:34 PDT (-0700)

Finally got a spore print—reddish brown—which suggests Tylopilus. Did not have a young specimen, so cannot speak to white pores, but my specimen was very dark. Also stained slowly a bit dark blue, then dark brown. Also, the stipe is significantly stockier than sordidus which supposedly has little odor, although it could be. porphyrosporus? Just a Tylopilus sp. at this point. May get to some microscope work eventually.


reminds me of a Tylopilus.
By: Debbie Viess (amanitarita)
2011-08-11 08:24:42 PDT (-0700)

Created: 2011-08-10 20:28:21 PDT (-0700)
Last modified: 2012-07-05 15:34:16 PDT (-0700)
Viewed: 126 times, last viewed: 2018-07-22 15:16:26 PDT (-0700)
Show Log