Observation 56624: Cortinarius purpurascens group

When: 2010-10-18

Collection location: Diamond and Crater Lake, Oregon, USA [Click for map]

Who: Ron Pastorino (Ronpast)

Specimen available

These had caps up to 8.3 cm across and were still fairly tacky in dry conditions.
The spores were very warty(for Corts) and ~ 8.2-9.5 X 5.5-8.3 microns.
KOH reactions yielded mostly subdued shades of brown at best.
The stipe base varied from slightly bulbous to slightly marginate.
One possibility may be C. montanus although my collection seems to lack olive tints. Refs: Mushroom Hobby and Mushrooms of the Pacific Northwest

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Eye3 = Observer’s choice
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Yes, of course…
By: Dimitar Bojantchev (dimitar)
2010-10-25 17:39:53 PDT (-0700)

Yes, of course. Magnify the second photo to the max and you will notice that the gills are bruising purplish-lilac, particularly towards margin.

I did consider the top photo, those to the right to be C. montanus, but if you magnify the image, you can see some purplish discoloration on one of them.

If you look carefully you will some on the lower stipes too.

They look very much like this:

Great photos!!

OK, thanks for the feedback but..
By: Ron Pastorino (Ronpast)
2010-10-25 17:18:12 PDT (-0700)
please elaborate on “..purpurascing effect on bruising..” I consider myself very gentle when handling mushrooms :-)
Very nice, but looks like C. purpurascens again.
By: Dimitar Bojantchev (dimitar)
2010-10-25 17:04:03 PDT (-0700)

Ron, looking those closely they look damn like Cortinarius montanus and they almost fooled me to exclaim, yes!! Not to mention that it is abundant in Oregon, right in that area. Kauffman described them from near by… In fact on the top picture on the right they look like C. montanus big time with that silky bluish stipe.


Brother Ron, you failed to appreciate the purpurascing effect on bruising once again. See it, it’s all over. And those spores look to me are from the Purpurascentes group. But I think you really learned the Cortinarius purpurascens after this exercise!!

These are not easy groups and you’re showing a tremendous progress and tenacity!!! It would not be possible to conclusively define what you had, had it not been for the great photographs!!


Created: 2010-10-25 16:34:46 PDT (-0700)
Last modified: 2013-12-29 09:56:55 PST (-0800)
Viewed: 102 times, last viewed: 2017-12-03 21:41:47 PST (-0800)
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