Observation 108961: Amanita thiersii Bas

When: 2012-09-07

Collection location: Baltimore Co., Maryland, USA [Click for map]

Who: Cory Zanker (cz27)

No specimen available

Very large mushrooms! 8-10 inches tall, slightly warm/yellowish tint, if not completely white. white run-off from these mushrooms littered all over the surrounding grass. these grew around the same location of my previous observation. grassy, several small groves of trees, spread out over space. shaggy and sticky all over.

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Eye3 = Observer’s choice
Eyes3 = Current consensus


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lol sorry about that
By: Cory Zanker (cz27)
2012-09-07 08:51:58 PDT (-0700)

glad to know that you don’t refer to yourself in the third person…

right, the yellowish gills, shaggy/stickiness, and residue on the surrounding grass were the main deciders, but i have a lot to learn about amanitas.

this would be very far north for them, and a. virosa seems like a possibility (only if it fits the same criteria).

By: I. G. Safonov (IGSafonov)
2012-09-07 08:26:55 PDT (-0700)

No, no. I am IGSRET is Rodham E. Tulloss.

Looks like a reasonable match. The habitat (growing on grass and away from trees) is also indicative of this species. A. thiersii is one of a few saprotrphoc (free-living) amanitas.

thanks RET
By: Cory Zanker (cz27)
2012-09-07 06:59:21 PDT (-0700)

There wasn’t much of an odor. Some features that really jumped out at me were its size (8-10 inches tall) and its slightly yellow gills. see this shot and the ones to its left and right on my website: http://500px.com/photo/13329009

Thanks for linking me to more info on A. cokeri. I’m pretty confident I figured it out now too, using mushroomexpert.com: http://www.mushroomexpert.com/amanita_thiersii.html

By: I. G. Safonov (IGSafonov)
2012-09-06 22:02:43 PDT (-0700)

The bulb doesn’t look right for A. cokeri. It lacks “white to brownish pyramidal warts and/or recurved scales” typically associated with this species and doesn’t appear bulbous enough. See http://www.amanitaceae.org/?Amanita cokeri for further details. Did you check for odor (pleasant or unpleasant)? RET is currently on vacation, so we’ll have to wait some time for his expert opinion on this and other amanita posts. :-)

Created: 2012-09-06 21:27:59 PDT (-0700)
Last modified: 2012-09-07 07:09:23 PDT (-0700)
Viewed: 60 times, last viewed: 2017-11-17 19:06:55 PST (-0800)
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