Observation 77914: Amanita “sp-S01” Tulloss
When: 2011-09-29
No herbarium specimen

Notes: Habitat:
Found in the grass next to sidewalk and driveway, next to crep myrtles

Cap:
8 cm, off white to cream, plastic like cuticle peeled away slightly, white universal veil patches, waxy to touch

Stem:
7-8 cm, white and velvety to touch, no annulus, volva with root like tip

Gills:
Free, cream color and close

Spore print:
White

Bruising:
light yellow outside of cut stem

Other info:
Fingers were waxy after handling the cap and gills.
Slight sweet odor, nothing chemical.
Other specimens had no annulus.

Proposed Names

41% (3)
Eye3
Recognized by sight
ret
41% (4)
Recognized by sight: See comment.
-28% (1)
Recognized by sight: Doesn’t look like section Amanita to me

Please login to propose your own names and vote on existing names.

Eye3 = Observer’s choice
Eyes3 = Current consensus

Comments

Add Comment
With regard to Alan’s name suggestion…
By: R. E. Tulloss (ret)
2011-10-07 12:55:20 PDT (-0700)

I think we need to take into account more than I previously mentioned. The specimens are exannulate and seem to have a little membranous limb at the top of the bulb. All known taxa of sect. Validae have a membranous annulus (of course, it could be lost). The little limb and absent annulus along with the squarely truncate lamellulae and the striate cap margin are rather strongly suggestive of gemmatoid species in section Amanita. If I imagine the cap to be yellow, there is a great similarity to Amanita sp-S01, which is partially described here:

http://www.amanitaceae.org/?Amanita+sp-S01

Anyway, that’s the way my thoughts have been developing…

Very best,

Rod

address
By: R. E. Tulloss (ret)
2011-10-07 12:31:35 PDT (-0700)

Adam and Debbie,

First, Debbie, thanks for thinking that this one would be of real interest to me. It is.

Secondly, Adam, material can be sent to me at

P. O. Box 57
Roosevelt, NJ 08555-0057

The specimen needs to be thoroughly dried (I guess it must be by now?). The material sent should include one or moree specimens that are neither so old as to be collapsing when dried or so young as to exclude the possibility of finding spores.

The specimen(s) can come by regular US mail. Please, mark the package:

“For scientific study only.
Dried and disinfected botanical specimen.
No commercial value.”

Use a small, firm box (like the ones the P.O. has for mailing old video tapes). A padded envelope does not protect against reduction to powder if a postal machine decides that it just has to flatten everything to the maximum.

Can you provide a lat./long. or a street address or the name of a park…something that would allow the collection to be automatically mapped if we can identify it well enough to know how to put it on www.amanitaceae.org?

I will process dried material as soon as I can, but (often) the response to a generous donation of material will be a “thank you” followed by a period in which we are dealing with everything else that is already on our plates.

Sincerely,

Rod Tulloss

Thanks Debbie
By: Adam Arendell (julius)
2011-10-07 11:38:09 PDT (-0700)

I do have a specimen of this and would love to contribute. How would I go about sending this? Name, Address and care guide lines for sending this through the mail.

amyloid reaction…
By: R. E. Tulloss (ret)
2011-10-07 11:30:22 PDT (-0700)

Just a little added thought.

Scrape the spores onto a piece of glass or china (something not reactive with iodine) before checking amyloidity. Get a little pile of spores that you can easily see with the naked eye. THEN add the Melzer’s or other iodine containing solution. Paper reacts strongly with Melzer’s to produce a positive amyloid reaction…and your spores can get lost in the dark background of the reacting paper.

Very best,

Rod

really interesting amanita here…
By: Debbie Viess (amanitarita)
2011-10-07 09:44:59 PDT (-0700)

and nice job on your documentation, esp. that black paper/white paper spore print!

you say that you don’t have a specimen, but you did bring it home to do a spore print…any chance that you have access to Meltzer’s solution? That would tell you whether this is a section Amanita or a Validae…

the base of your largest amanita appears to show both a rimmed bulb and a smooth one. most interesting and unusual is that tuberculate-striate margin.

It’d be nifty if you saved it and could get it to Rod…

If not, at least it has been documented here on MO.

from the photo…
By: R. E. Tulloss (ret)
2011-10-03 15:34:55 PDT (-0700)

I’d say that the spore print is more of a pale cream in comparison to the white paper below it. A distinctly non-white spore print in an amanita can be very useful IF the color has not be caused by the edge cells of the gill coming off on a spore print. In the latter case, A. flavoconia can appear to have yellowish spores when the spores are actually quite white…. The yellow is the color of the edge cells that are easily dislodged from the bottom edge of the gills.

very best,

R.

Suggestion for addition to description
By: R. E. Tulloss (ret)
2011-10-03 15:22:03 PDT (-0700)

Cap with tuberculate-striate (bumps between the grooves) margin. It can also be useful to estimate (or, better, measure) the fraction of the cap radius that is occupied by the grooves (there will be a little variation in many cases).

With regard to the gills, it is worth spending some time describing the “short gills” or “lamellulae.” Their shape has been considered a useful character. If they are very scattered, this is important because they are often distributed rather commonly (although unevenly) between the full-length gills (lamellae). In the present case, the lamellulae are mostly squarely cut off (truncate) although a few seem to be somewhat rounded at the end nearest the stem. They are very plentiful and of very diverse lengths in the photograph of the underside of parts of the two caps (a very useful photograph).

Since the stem is bulbous at the base, it is very unlikely that it was originally totally elongating. Hence, among the taxa that commonly have a striate cap margin, we can probably eliminate placement of the specimen in any of the following sections: Vaginatae, Caesareae, and Amidella. Of sections without a (usually) striate cap margin, Lepidella and Phalloideae are very unlikely to be home to this critter.

Although I have recently found a species of section Validae with a very distinctly striate margin on every specimen, it is still most likely that the specimen belongs in section Amanita. So I’m going to suggest that as a first level ID.

Rod.

Created: 2011-10-03 10:38:57 PDT (-0700)
Last modified: 2012-08-06 08:56:24 PDT (-0700)
Viewed: 184 times, last viewed: 2016-10-21 23:44:35 PDT (-0700)
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