Observation 51481: Cortinarius talus Fr.

When: 2010-08-12

Collection location: Fraser Experimental Forest, Grand Co., Colorado, USA [Click for map]

Who: Ron Pastorino (Ronpast)

Specimen available

Another Colorado Cortinarius which seems to lack a name.
The cap appeared dry, somewhat virgated, and up to 7.8 cm across.
KOH on the cap gave a slight red brown color.
KOH on the other surfaces was neg.
The spores were ~ 8.4-9.2 X 5.1-6.1 microns. They were relatively smooth and many displayed an oil droplet(in KOH).
I changed the proposed name to Cortinarius talus based on the suggestion from Dimitar and the similarity to at least the western NA version of the European species.

Proposed Names

57% (1)
Eye3 Eyes3
Used references: Mushroom Hobby website
Mushrooms of the Pacific Northwest by Trudell & Ammirati

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Eye3 = Observer’s choice
Eyes3 = Current consensus


Add Comment
Close to the Western American version of Cortinarius talus…
By: Dimitar Bojantchev (dimitar)
2010-08-28 06:54:58 CDT (-0400)

Ron, great observation — this one comes closer to the vicinity of Cortinarius talus, the way we interpret it in the American West. I had one sequence, which was not very good for a confident judgment, but it still indicated closeness to the European material. I will get a better one eventually.

Here is a similar collection from California.

Mushroomhobby.com link


Created: 2010-08-27 19:32:05 CDT (-0400)
Last modified: 2010-08-28 13:10:26 CDT (-0400)
Viewed: 98 times, last viewed: 2017-11-14 09:53:38 CST (-0500)
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