Observation 29426: Amanita sect. Vaginatae sensu Zhu L. Yang
When: 2009-11-22
Herbarium specimen reported

Notes: Monterey pine forest.

Proposed Names

4% (2)
Eye3
Recognized by sight: White-capped grisette with rusty-staining UV patches, slightly pinkish gills in largest specimen, but relatively small sulcations on cap.
Used references
83% (1)
Eyes3
Recognized by sight
Based on chemical features: need to check for amyloid rxn.
-78% (2)
Recognized by sight: possibly subsection limbatulae; need to check spores for amyloid rxn.

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Eye3 = Observer’s choice
Eyes3 = Current consensus

Comments

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Spores non-amyloid.
By: Christian (Christian Schwarz)
2009-12-05 04:14:58 CST (+0800)

Just made one quick slide in between studying for finals. No time to measure spores til next week.

High School
By: Christian (Christian Schwarz)
2009-12-05 02:04:40 CST (+0800)

Alas, solely my own interest. But wouldn’t it be nice if macrofungi were a bigger part of the curriculum?

here’s the pink gilled Santa Cruz lep from 2005…
By: Debbie Viess (amanitarita)
2009-12-04 11:36:29 CST (+0800)
All uses of Amanita alba are incorrect.
By: R. E. Tulloss (ret)
2009-12-04 11:20:43 CST (+0800)

Christian! You used the Amanita Studies site in high school? Was this part of the curriculum or your own special interest?

Yes, there is something that is called that in the east, but it should be something like “A. vaginata var. alba in the sense of eastern N. American authors.” I’ve collected it several times. We also have a cream-colored member of the “ceciliae group” that is probably confused with the “var. alba” sometimes.

R.

isn’t there also an amanita here in North America that’s called alba…
By: Debbie Viess (amanitarita)
2009-12-04 11:14:28 CST (+0800)

and looks like a white grisette? I believe Ron Pastorino won a NAMA photo contest with an image of it…

as to limbate leps, funny you should mention it…the last pink-gilled amanita that I saw out here was a limbate lep from Santa Cruz, noticed and photographed by David Arora and illustrated and dried by me. I believe you already have the dessicata, Rod…

I will certainly check the spores for amyloid reaction.
By: Christian (Christian Schwarz)
2009-12-04 10:35:01 CST (+0800)

Standard procedure for Amanita, as I learned from your website back when I was in high school and had no access to Melzer’s.

Amanita alba….
By: R. E. Tulloss (ret)
2009-12-04 10:23:41 CST (+0800)

Amanita alba is a junior synonym of Amanita ovoidea a large European species that is commonly eaten. It’s commonly placed in section Amidella, but Bas and I have both considered the possibility that it should be placed in section Lepidella…possibly in subsection Limbatulae.

When you get a chance to look at this collection. Even though you believe it falls in sect. Vaginatae, I think it would be good to check the spores for the amyloid reaction. I would be very interested in knowing what you find out when you investigate the exsiccata. I would also be interested in seeing them myself sometime.

Very best,

R

I think that Amanita alba is a pretty meaningless term. this is something way cooler.
By: Debbie Viess (amanitarita)
2009-12-04 10:07:15 CST (+0800)

Those pink gills tho, not in a velosa.

RE: A. velosa
By: Christian (Christian Schwarz)
2009-12-04 10:06:36 CST (+0800)

I’ve heard about that, but I feel fairly confident that these are not A. velosa due to 1) the rusty staining on the volval remnants, which I have never observed in A. velosa, as well as 2) the phenology (fall) and 3) the habitat (pines).
I will be doing a lot of investigation of my old collections starting in a week or so, and this is at the top of my list for examination – I’ll post more information then.

Many of the “Amanita alba” in SFSU
By: R. E. Tulloss (ret)
2009-12-04 09:38:31 CST (+0800)

…are simply white specimens of A. velosa.

Are there spores on the herbarium specimen?

R.

Created: 2009-12-04 07:15:57 CST (+0800)
Last modified: 2012-06-07 05:39:21 CST (+0800)
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