Observation 145241: Cortinarius (Pers.) Gray

When: 2013-09-10

Collection location: MP 14.5 E. Larch Mountain Rd., Multnomah Co., Oregon, USA [Click for map]

Who: Daniel B. Wheeler (Tuberale)

No specimen available

Found barely erumpent near trail at top of Larch Mountain, about 150 yards west of parking lot. Exterior mostly dark brown, with narrowing root-like base. Interior context of stipe turns light blue within 30 seconds.


As dug. Buried to top of cap. (Dark brown cap top all that was visible.)
Another view as dug. Notice narrowing rooting stipe.
Very short gills, covered by veil. Cut cap context turns light blue after 30 seconds.
Veil detail.

Proposed Names

24% (2)
Used references: Arora, Mushrooms Demystified.
55% (1)
Recognized by sight: C. magnivelatus doesn’t have purple gills.

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

Eye3 = Observer’s choice
Eyes3 = Current consensus


Add Comment
Just retrieved specimen.
By: Daniel B. Wheeler (Tuberale)
2013-09-11 19:41:01 PDT (-0700)

And made two more slices of it. Original specimen gills have now toned to brown-purple. And context of slices, after drying for all day, now turned either faintly purplish or completely amethyst-colored. Also found small area on opposite side with gills. And the smaller side has what appears to be cortina throughout what normally is a open area under the gills.

I’ve run out of floppy disks, will have to purchase more. Hope to have more photos of this soon.

That filled area between gills and stipe is weird!

By: Christian (Christian Schwarz)
2013-09-11 19:33:11 PDT (-0700)

I don’t think this is a secotioid species, just a young Cortinarius

Cortinarius velatus
By: Noah Siegel (Noah)
2013-09-11 19:30:01 PDT (-0700)

has a violet(ish) cap, I don’t know about the gills on that species.

But I doubt that this is a secotioid species. More likely just a button that hasn’t expanded yet.

Thanks, Noah.
By: Daniel B. Wheeler (Tuberale)
2013-09-11 19:09:35 PDT (-0700)

I had the specimen drying most of today. Temperature got up to 95, so it may be dry rather quickly.

The only sequestrate Cortinarius I have heard of before are C. magnatus and C. verrucisporus. I see in Arora now that C. weibeae is also a possibility in the Cascades, along with C. bigelowii and C. velatus. Don’t know that any of these have purplish gills. Will have to research them.

You’re right.
By: Daniel B. Wheeler (Tuberale)
2013-09-11 19:04:29 PDT (-0700)

I see. When I took the photo, I examined the small gills. They were white at that time. Perhaps they changed color too?

What I thought was just an ordinary fungus is rapidly turning into something new.

Exciting, actually.

By: Noah Siegel (Noah)
2013-09-11 19:03:20 PDT (-0700)

Christian is right about C. magnivelatus not having flesh that changes to blue, nor does it have bluish-violet gills as shown in your photograph.

If you still have it, put a drop of iodine/Melzer’s on the stipe flesh and see what color it goes.

By: Christian (Christian Schwarz)
2013-09-11 16:58:56 PDT (-0700)

I identified the color by looking at the picture. I wouldn’t call it a leap. I will let others look at the photo and weigh in.

C. magnivelatus also doesn’t change to blue in the flesh, so it’s still not that species…

And I’m still not sure why time was of the essence with regard to date of the observation? Just change it. Edit observation button.

Change from 9/11 to 9/10, Christian.
By: Daniel B. Wheeler (Tuberale)
2013-09-11 16:15:40 PDT (-0700)

Oh, and I see you have lept again to an erroneous conclusion. I said nothing about this observation having purple gills. I did say “Interior context of stipe turns light blue within 30 seconds.” I don’t know how you identified “purple gills.”

Couldn’t change
By: Christian (Christian Schwarz)
2013-09-11 11:54:06 PDT (-0700)

the observation fast enough for what?

Actually found 9/10.
By: Daniel B. Wheeler (Tuberale)
2013-09-11 10:08:10 PDT (-0700)

Couldn’t change obs. fast enough.

Created: 2013-09-11 10:06:39 PDT (-0700)
Last modified: 2013-09-11 19:01:17 PDT (-0700)
Viewed: 59 times, last viewed: 2017-06-16 10:50:58 PDT (-0700)
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