Observation 73779: Cortinarius harrisonii Ammirati, Niskanen & Liimat.

When: 2011-08-10

Collection location: Luzerne Co., Pennsylvania, USA [Click for map]

Who: Dave W (Dave W)

No specimen available

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
84% (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 23:16:08 CST (-0500)

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

thanks Noah.
By: Richard Kneal (bloodworm)
2014-12-09 21:46:15 CST (-0500)
By: Noah Siegel (Noah)
2014-12-09 21:25:30 CST (-0500)

see “Cortinarius section Sanguinei in North America”

By: Richard Kneal (bloodworm)
2014-12-09 20:21:20 CST (-0500)

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 19:39:37 CST (-0500)

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 19:24:40 CST (-0500)

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

Thanks Emma.
By: Dave W (Dave W)
2014-12-09 18:30:16 CST (-0500)

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 18:19:28 CST (-0500)

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 19:35:29 CST (-0500)

we may eliminate C. harrisonii from consideration here.

Returned to the spot
By: Dave W (Dave W)
2011-08-11 19:30:36 CDT (-0400)

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 03:32:02 CDT (-0400)
Last modified: 2014-12-09 20:19:06 CST (-0500)
Viewed: 173 times, last viewed: 2018-07-16 12:59:31 CDT (-0400)
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