Observation 10821: Lactarius circellatus var. borealis Hesler & A.H. Sm.

When: 2008-09-06

Collection location: McCall, Idaho, USA [Click for map]

Who: Debbie Viess (amanitarita)

Specimen available


Proposed Names

21% (2)
Recognized by sight: by NAMA taxo staff. white latex, bitter taste.
65% (2)
Recognized by sight: may as well make the sighting name match the name with the specimen!

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= Observer’s choice
= Current consensus


Add Comment
just a photo ID, years after the fact?
By: Debbie Viess (amanitarita)
2013-02-16 16:44:56 GMT (+0000)

or something more tangible?

One can only hope that the IDers at McCall (Cripps and Evenson and Beug) had a good reason for putting the name “circillatus var. borealis” on this mushroom, using cues from the fresh mushroom.

I never put a name on these at NAMA, but I do see similarities between circellatus var. borealis and caespitosus.

Why a disputed name, now?

Good job Debbie!!
By: Dimitar Bojantchev (dimitar)
2010-03-16 08:33:27 GMT (+0000)

For having documented this Idaho milk cap. I have several collections of it from then & there too. One thing – please add “var. borealis” otherwise we’re risking to make fools of ourselves with the Europeans who know the real L. circellatus. The original L. circellatus from Europe has some very peculiar hosts and I’d bet $1000 that ours is not within 7% of 18.S base pairs match compared to ours. I’ll expand on that some more on MushroomTalk later this week.


P.S. Did you notice those purple/vinacious stains on the gills?

Created: 2008-09-10 15:44:38 BST (+0100)
Last modified: 2013-02-16 05:40:07 GMT (+0000)
Viewed: 196 times, last viewed: 2019-01-28 05:08:42 GMT (+0000)
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