Observation 22960: Amanita Pers.
When: 2009-07-06
No herbarium specimen

Notes: This was found in the same area, mainly coniferous woods… Norway Spruce, hemlock, as where I found obs 22594. This one shares many of the same characteristics, sticky cap surface, bulb with abrupt margin, whitish volval patches on cap. The main difference is no striations on the cap margin, and some volval remains on the stalk. Maybe the striations disappear for mature specimens? Stalk hollow. About 3 inches high, over one inch cap diameter. First spore pic in KOH, second in Meltzer’s.

Proposed Names

51% (4)
Eye3 Eyes3
Recognized by sight
-2% (4)
Eye3
Recognized by sight: Here in Germany this would be called without doubt Amanita gemmata. But I know the situation in America is somewhat more complicated in the pantherina-group
50% (1)
Recognized by sight

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Eye3 = Observer’s choice
Eyes3 = Current consensus

Comments

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Thanks David,
By: groundhog
2014-04-25 17:58:30 BRT (-0300)

This material has been accessioned to Rod’s herbarium. Rod said he though it was A. velatipes
-Naomi

Duh!!!
By: Dave in NE PA
2009-07-10 13:24:47 BRT (-0300)

I had forgotten until just this morning that the spores in my initial collection 22594 seemed too globose to fit Pantheria. I did not get a very good spore sample from 22594, and I made the mistake of mounting in KOH instead of Meltzer’s. But I could still see that “subglobose to ellipsoid” did not apply. I think this was one reason why I had suggested A. frostiana as a possibility. Rod lists a “pale version” of frostiana… but the only yellow on my specimens is on the cap, which would seem to make mine quite pale for this yellowish species.

No well defined ring,
By: Dave in NE PA
2009-07-10 02:09:38 BRT (-0300)

but a bit of veil remnant sticking to the stalk. 22594 had veil remnant clinging to the cap margin and underside.

the mystery deepens!
By: Debbie Viess (amanitarita)
2009-07-09 11:51:03 BRT (-0300)

did this critter have an annulus?

Globose spores
By: R. E. Tulloss (ret)
2009-07-09 10:24:17 BRT (-0300)

It looks as though the spores are globose in Dave’s pictures. Both Amanita gemmata and A. russuloides are reported to have spores that are, on average, ellipsoid.

R.

Yes,
By: Dave W (Dave W)
2009-07-09 08:52:10 BRT (-0300)

cap striations do tend to vary with specimen’s age and perhaps also atmospheric conditions. But some species seem to exhibit rather persistent striations. For instance, A. banningiana. So I simply point out that the two collections exhibited this difference. My gut feeling is that these are the same species. If they are, in fact the same, then it’s nice to know that this macro variation occurs within the species.

I agree with Debbie
By: Gerhard Koller (Gerhard)
2009-07-08 19:48:52 BRT (-0300)

about the striations. They are no safe tool for ID.

stipe base of A. gemmata
By: Andreas Gminder (mollisia)
2009-07-08 16:38:52 BRT (-0300)

@Rod: You say Amanita gemmata has a volva with a limb. The european A. gemmata (= A. junquillea) has not, it has exactly the same “rolled sock” as A. pantherina. Do I mix something may be?

Herbarium specimen available.
By: Dave W (Dave W)
2009-07-08 15:02:53 BRT (-0300)

I made the original post using my home computer, where I am called “Dave in NEPA.” Here at work I am “Dave W.”

That box
By: Paul Derbyshire (Twizzler)
2009-07-08 14:32:25 BRT (-0300)

can still be checked, using the “edit observation” link.

I forgot
By: Dave W (Dave W)
2009-07-08 13:34:25 BRT (-0300)

to check the “herbarium specimen” box. I have the dried materials from each of 22960 and 22594. I assume that, at some point, I shall send them off to Rod.

ah yes, your curious slimy capped friend!
By: Debbie Viess (amanitarita)
2009-07-08 12:17:39 BRT (-0300)

do save some next time. we’d all like to know what it is, or at least gather more clues to a possible ID.

in my collecting experience, cap striations in section amanita can be present or absent, even within species (grisettes always have them; gemmata/pantherina etc. sometimes do, sometimes don’t).

I don’t think this can be gemmata
By: R. E. Tulloss (ret)
2009-07-08 11:12:56 BRT (-0300)

_Amanita gemmata has a limbate volva. This species is strongly pantherinoid with its “rolled sock” (cothurnate volva). No name comes to mind. This has been mosted a couple of times recently. We should get some dried material under a scope.

Very best,

R.

MushroomExpert lists
By: Dave in NE PA
2009-07-06 23:46:42 BRT (-0300)

A. russuloides as an eastern US mushroom that mimics what has (had?) been called A. gemmata in the western US. If I find another fresh specimen I’ll try out the KOH test which Kuo mentions.

Created: 2009-07-06 13:36:48 BRT (-0300)
Last modified: 2014-04-25 17:57:47 BRT (-0300)
Viewed: 178 times, last viewed: 2016-04-08 11:05:52 BRT (-0300)
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