Observation 123015: Amanita Pers.

When: 2013-01-20

Collection location: Bonny Doon, California, USA [Click for map]

Who: Zoyd Wheeler (antizoyd)

No specimen available

Looks like this may be A. ocreata but for the fairly distinctive striations. This specimen was 6.5cm tall and 4cm wide at the cap.

Proposed Names

15% (4)
Recognized by sight
55% (1)
Recognized by sight: strong striations, saccate volva, UV path on cap, early season point away from A. ocreata. What it is, I’m not sure.

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Eye3 = Observer’s choice
Eyes3 = Current consensus


Add Comment
By: Zoyd Wheeler (antizoyd)
2013-01-21 20:39:08 CST (-0500)

Debbie and Alan for your help. I will try to get a spore print and will dry it.

“early” for ocreata, but not “too” early…
By: Debbie Viess (amanitarita)
2013-01-21 19:56:07 CST (-0500)

at least two sightings are on MO for January. Here’s one:


got Meltzers?
By: Debbie Viess (amanitarita)
2013-01-21 19:51:33 CST (-0500)

if so, you can check for spore amyloidity w/out a scope. Try and get a sporedrop/sporeprint on a slide, or some other glass surface.

that will at least get us to section: blue spores in Meltzers for an ocreata type, uncolored for a caesarea type.

otherwise, dry it and get it to one of us. there are a ton of good folks in the Santa Cruz area w/both KOH (needs to be done fresh)and Meltzers (fresh or dry).

with a patch on the cap, striate margin and a totally elongating bulb after the volva was stripped off, it could be one of our white versions of a coccora.

Hard to tell
By: Zoyd Wheeler (antizoyd)
2013-01-21 16:13:54 CST (-0500)

about the stem, the mushroom is drying up fast. As best as I can tell it doesn’t look like the stem is enlarged at the base…pretty much equal throughout.

Kuo also has some suggestions…
By: Debbie Viess (amanitarita)
2013-01-21 16:05:18 CST (-0500)
You can get some online
By: Alan Rockefeller (Alan Rockefeller)
2013-01-21 16:03:56 CST (-0500)

Or bring the mushroom to the UCSC biology building and ask someone to put a little KOH on it. They might even give you a little bottle if you ask nicely, KOH is extremely cheap in bulk. Or if you are in SF for some reason I’ll give you some, but I don’t get back until Thursday.

If you peel away the volva, is the stem enlarged?

It does look like A. ocreata to be, despite a couple signs to the contrary. I can’t imagine what else it could be.

By: Zoyd Wheeler (antizoyd)
2013-01-21 15:17:49 CST (-0500)

I didn’t realize KOH was so hard to find locally. Seems I’m not going to be able to test it after all. I tried feed stores, hardware stores, craft supply stores and biodiesel places. Santa Cruz Biotechnology sells it but only online. Sigh. I shall order some online for the next time.

Thanks Debbie
By: Zoyd Wheeler (antizoyd)
2013-01-21 14:13:30 CST (-0500)

I’ll get some KOH today and try that. This specimen doesn’t seem all that old either. It was the only thing I found yesterday up here in Bonny Doon that wasn’t all wrinkled up…

got KOH?
By: Debbie Viess (amanitarita)
2013-01-21 13:53:33 CST (-0500)

a drop on the cap will turn bright yellow if it is ocreata. if so, it’s the first BA record for this season.

in age, even non-striate-margined amanitas can show striations. unusual that there is a patch of universal veil on the cap as well.

Created: 2013-01-20 19:25:47 CST (-0500)
Last modified: 2016-02-07 22:43:04 CST (-0500)
Viewed: 73 times, last viewed: 2018-04-16 11:40:00 CDT (-0400)
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