Observation 83017: Amanita sect. Caesareae Singer
When: 2011-11-22
Who: sheepyrock
No herbarium specimen

Notes: Found among other Amanita lanei with normal tan coloring. These specimens, however, were pure white. Is this a ‘spring coccora’, or an A. ocreata, or what?

Proposed Names

-25% (2)
Eye3
Recognized by sight: White,gilled, striate margin, thick white patch on cap, large annulus, large volva
63% (2)
Recognized by sight: Beautiful white form! Excellent find!

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Eye3 = Observer’s choice
Eyes3 = Current consensus

Comments

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Agreeing with Debbie
By: Christian (Christian Schwarz)
2012-03-12 21:25:36 UTC (+0000)

Revisiting this, I agree that this is one of the Coccora, but other than the season, there’s no supporting reason to vote one way or the other.

can’t really vote for this one…
By: Debbie Viess (amanitarita)
2011-11-22 20:59:13 UTC (+0000)

lanei is deprecated and calyptroderma currently applies to both the spring and fall coccora, so there is no easy way to distinguish what you are voting for.

I think that we really can’t tell by just a photo.
By: Debbie Viess (amanitarita)
2011-11-22 20:53:37 UTC (+0000)

“Spring forms” occur with tan oak and madrone, as well as mountain conifers. It would be very very unusual for that many white forms to show up among normals.

When I see white velosas, and I do on a regular basis, I find one or maybe two examples within a field of many other normals. Proximity is no guarantee of ID, as we well know.

With all of our normal clues missing (restricted habitat, time of fruiting, etc.) I don’t really think that we can make a determination on color alone.
As long time hunters well know, other than cap color, the two coccora are indistinguishable in the field.

In this case, I think that DNA is the only way to really know what species we are dealing with here.

This is also not the first “spring coccora” reported from the north coast of California this fall (see Mushtalk).

It IS one of the edible coccora though, regardless of exact species outcome. As far as I know, Amanita ocreata doesn’t even occur in coastal Mendocino. Too bad that is not also true for phalloides, which also can (again very rarely) throw a white form.

See the BAMS coccora page for more details:

http://www.bayareamushrooms.org/mushroommonth/coccora.html

Spring form (finally proven to be a distinct species) is currently in publication but hasn’t hit the newstands quite yet.

Why I don’t think it’s the spring species…
By: Christian (Christian Schwarz)
2011-11-22 20:06:35 UTC (+0000)

Although the spring species does occasionally fruit in fall, the fact that it this was found in fall is a good preliminary bit of evidence against that species.

Second, ‘normal’ tan forms were found nearby.

Third, and perhaps most importantly – I don’t think there are oaks around Albion for some distance, and the spring species is an oak associate.

fantastic!
By: Britney Ramsey (Riverdweller)
2011-11-22 19:15:00 UTC (+0000)

Created: 2011-11-22 18:45:10 UTC (+0000)
Last modified: 2012-03-12 21:26:45 UTC (+0000)
Viewed: 118 times, last viewed: 2016-11-15 14:44:51 UTC (+0000)
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