Observation 73779: Cortinarius harrisonii Ammirati, Niskanen & Liimat.
When: 2011-08-10
No herbarium specimen

Notes: I was tempted to post this as “sanguineus.” But the habitat included no coniferous trees. The group seen here grew at the base of a small deciduous tree… hickory, I think.

Proposed Names

32% (4)
Used references: Arora: with hardwoods
83% (3)
Eye3 Eyes3
Recognized by sight: yellow basal mycelium; red-orange cap

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

Eye3 = Observer’s choice
Eyes3 = Current consensus


Add Comment
Distinct morphological species
By: Emma Harrower (eharrower)
2014-12-09 20:16:08 PST (-0800)

There are no GenBank sequences yet, but I do have recent collections of both species.

thanks Noah.
By: Richard and Danielle Kneal (bloodworm)
2014-12-09 18:46:15 PST (-0800)
By: Noah Siegel (Noah)
2014-12-09 18:25:30 PST (-0800)

see “Cortinarius section Sanguinei in North America”

By: Richard and Danielle Kneal (bloodworm)
2014-12-09 17:21:20 PST (-0800)

what name would take precedence?
has any DNA work been done separating them on basal mycelium?

I don’t see these very often either, Martin.
By: Dave W (Dave W)
2014-12-09 16:39:37 PST (-0800)

And you’d think that if they’re there, you’re gonna see these colorful mushrooms, especially in an area frequently visited… like this spot which is a 5 minute drive from my house.

Thanks again, Emma. And sorry about having apparently left out the most telling photo from the original post. I didn’t notice the yellow until after the photo was posted here on MO and I zoomed in on it.

By: Martin Livezey (MLivezey)
2014-12-09 16:24:40 PST (-0800)

are tough to find…., I have not seen them in several years.

Thanks Emma.
By: Dave W (Dave W)
2014-12-09 15:30:16 PST (-0800)

I found another photo of this collection. The newly posted photo shows some yellow mixed in with the debris clinging to the stipe base.

In answer to your question…
By: Emma Harrower (eharrower)
2014-12-09 15:19:28 PST (-0800)

C. harrisonii has yellow basal mycelium while C. marylandensis has pale vinaceous pink to pinkish buff basal mycelium.

I’m wondering how…
By: Dave W (Dave W)
2014-12-02 16:35:29 PST (-0800)

we may eliminate C. harrisonii from consideration here.

Returned to the spot
By: Dave W (Dave W)
2011-08-11 16:30:36 PDT (-0700)

and made the collection. KOH on cap immediately dark purple, almost blackish. That’s in the ballpark with marylandensis… but no rose red flash.

Posting a few more pics.

Created: 2011-08-11 00:32:02 PDT (-0700)
Last modified: 2014-12-09 17:19:06 PST (-0800)
Viewed: 168 times, last viewed: 2017-06-09 16:57:49 PDT (-0700)
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