Observation 123015: Amanita Pers.
When: 2013-01-20
No herbarium specimen

Notes: 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


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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: 67 times, last viewed: 2016-10-20 17:53:47 CDT (-0400)
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