When: 2015-06-13

Collection location: Daniels Summit, Uinta National Forest, Utah, USA [Click for map]

Who: Dan Molter (shroomydan)

No specimen available


Proposed Names

28% (1)
Recognized by sight: I’d say definitely not C. magnivelatus

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= Observer’s choice
= Current consensus


Add Comment
Sorry for the confusion.
By: Ron Pastorino (Ronpast)
2015-06-21 13:04:38 -05 (-0500)

I didn’t mean to imply that there were a bunch of Cortinarius species that approach “gastroid” status growing in high altitude areas. As David Arora notes in his MD description of Cortinarius magnivelatus; “Many Cortinari tend to fruit under the duff in dry weather, but do not have the persistent membranous veil of this species”.
Many of my recent posts of Cortinarius species in the last couple of months from the Sierras and southern Cascades were of species only discernible in the field by a “shrump”.
By the way Dan, your MO#206641 actually fits the description for Cortinarius verrucispora a little better. The yellowish cap and veil are it’s hallmarks. Either way, it would still represent the most easterly sighting for these species, at least on MO.

I have removed my suggestion of C. magnivelatus from
By: Daniel B. Wheeler (Tuberale)
2015-06-21 03:17:22 -05 (-0500)

obs. 206641. While it may be C. magnivelatus, without a voucher specimen and microscopy that cannot be confirmed with certainty.

For Ron: yes, I am aware of some other hypogeous Cortinarius species. I did not see any purple on the specimens in question. But whether these are at 8,000 feet or 12,000 feet elevation, they still need some serious examination.

C. magnivelatus is the only species I know of which approaches a sequestrate Cortinarius that is typically found hypogeously, often completely buried. Ron says “it’s quite common for Cortinarius species to never or barely break the surface at higher elevation areas in the spring,” I wish he would offer examples so we could discusss them.

Maybe this is an extension of the range for C. magnivelatus. Maybe it is a new species. In either case it needs documentation and preservation of samples for later examination.

extension of the known range
By: Dan Molter (shroomydan)
2015-06-20 21:49:47 -05 (-0500)

Daniel, did you mean that observation 206641 extends the known range of C. magnivelatus? Ron seems pretty certain that these purple corts are a different species. observation 206641 was found in the same general area, but shows no purple, and has a more obviously magnificent velvety cortina. Both mushrooms were found under duff in areas with mixed firs, pines, and aspen. Around 8000 feet.

There are dozens of Cortinarius species
By: Ron Pastorino (Ronpast)
2015-06-20 20:17:33 -05 (-0500)

with purple colors….Cortinarius magnivelatus is not one of them.
Also, it’s quite common for Cortinarius species to never or barely break the surface at higher elevation areas in the spring.

The description
By: Daniel B. Wheeler (Tuberale)
2015-06-20 20:00:07 -05 (-0500)

of C. magnivelatus in Field Guide To North American Truffles does not mention any purple on or in the sporocarp. This could have been missed, but knowing Dr. James Trappe as I do, I would doubt it greatly.

This could be an important extension of the known range, Dan. Currently it is known only from OR and CA. Utah is not included in the range, so Utah has not been found before. It is found at higher elevations, associated with pine, hemlock, and true fir.

It is always hypogeous. I have found it near Sisters, Oregon at about 2500 feet elevation (with almost no cortina present), but the known range extends into Central CA at much higher elevations.

Yes, found under duff
By: Dan Molter (shroomydan)
2015-06-20 03:45:24 -05 (-0500)

The cortina remnants look insubstantial on the stem, but on the edges of the cap they do appear to be thick and velvety.

Cortinarius magnivelatus is plausible, but I did not notice much purple in the other observations attached to that name.

If this was found under duff
By: Daniel B. Wheeler (Tuberale)
2015-06-15 21:37:25 -05 (-0500)

and have a thick, felty cortina, it would likely be Cortinarius magnivelatus, Dan. Compare to other C. magnifelatus here on MO.