Observation 198186: Russula americana Singer


Rosy Russula acrid (1).JPG
Rosy Russula acrid (2).JPG
Rosy Russula acrid (3).JPG
Rosy Russula acrid (4).JPG

Proposed Names

83% (1)
Eye3 Eyes3
Recognized by sight
Used references: internet research

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Eye3 = Observer’s choice
Eyes3 = Current consensus


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By: Robin Hudson (Robin Hudson)
2015-02-22 13:11:22 PST (-0800)

I suspect I will have to get a microscope once I can figure out a safe place to put it with a 2-year old…I have a hard enough time keeping him out of the mushrooms we bring home…(!) :-)

My offer to study this Russula is still valid !
By: Claude Kaufholtz-Couture (Claude Kaufholtz-Couture)
2015-02-22 12:13:40 PST (-0800)

You are lucky to be able to botanize all year long. In Quebec, the winter, which is not ended yet, spoils us in cold temperature (between -15C° and -40C°).

I have not found polar mushrooms yet! ;-D
It is always pleasant to be able to observe and deepen our studies! During slack season, I make of the microscopy.

Russula americana
By: Robin Hudson (Robin Hudson)
2015-02-22 11:30:58 PST (-0800)

I have mostly Douglas Fir, Western Hemlock, Sitka Spruce, and Red Alder in my area. I will make note of what tree I find it near when I find it next and get a sample. (And in the meantime, look up all the terms you used Claude…) I’m excited to be able to learn more about this one!!

Russula americana
By: Claude Kaufholtz-Couture (Claude Kaufholtz-Couture)
2015-02-10 08:22:56 PST (-0800)

Thank you very much!

Russula americana
By: Noah Siegel (Noah)
2015-02-10 06:47:34 PST (-0800)

Almost always grows with true Firs Abies, and maybe Hemlock as well. Russula sanguinea is with pine.

The spores are also a couple of microns larger for americana

Russula americana
By: Claude Kaufholtz-Couture (Claude Kaufholtz-Couture)
2015-02-10 03:50:17 PST (-0800)

Is its stipe always with scrobicules (fossette or dimple)?

Hi Robin !
By: Claude Kaufholtz-Couture (Claude Kaufholtz-Couture)
2015-02-10 02:43:11 PST (-0800)

Thank you for the information. From my part, I had never heard about Russula americana.
Can you make of the microscopy? The difference is maybe also in the pileipellis. It would be necessary to study him.
If you can make an exsiccata with the deposit, I’m in to make the study.
Good search and thank you again!

Russula americana
By: Robin Hudson (Robin Hudson)
2015-02-07 12:58:21 PST (-0800)

I don’t have any documentation on this mushroom – I only ID by sight, so I don’t ID a lot of Russulas(!) However, this Red Russula is rather distinctive, and when researching Russula sanguinea I found this on mushroomexpert.com:

“On the West Coast, Russula sanguinea has a look-alike in Russula americana, which according to Thiers (1997b) differs only in spore dimensions; its spores measure 9-11 × 8-11 µ. Russula americana may eventually be the name best applied to the West Coast versions of Russula sanguinea; while I doubt that it is truly distinct by virtue of spore dimensions and nothing else, it is a species name that represents an original collection from the Pacific Northwest (rather than Europe). The strikingly red stems of West Coast, sanguinea-like mushrooms are perhaps another morphological feature separating these mushrooms from their European and eastern North American counterparts, whose stems are usually substantially less red.”

I am interested in more research being done on this (and Russulas in general); as I mentioned, this mushroom is very distinctive in its very red stem and I’d love to see it get the recognition it deserves!

Russula americana
By: Claude Kaufholtz-Couture (Claude Kaufholtz-Couture)
2015-02-06 02:38:53 PST (-0800)

Beautiful specimen. Have you some documentation on this Russula?
Thank you.

Created: 2015-02-05 22:46:40 PST (-0800)
Last modified: 2015-02-07 12:58:46 PST (-0800)
Viewed: 104 times, last viewed: 2017-10-05 08:49:58 PDT (-0700)
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