Observation 16260: Agaricomycetes Doweld

When: 2008-12-12

Collection location: Josephine Co., Oregon, USA [Click for map]

Who: Lee (tariumdragon)

No specimen available

Believe this is a young specimen of Amanita phalloides. It is possible that it could also be Tricholoma magnivelare, but does not have a distinct smell, and does not seem to have the coloration/patterns seen in that species.

[admin – Sat Aug 14 02:01:39 +0000 2010]: Changed location name from ‘Josephine County, Oregon’ to ‘Josephine Co., Oregon, USA’


Proposed Names

-55% (6)
Used references: Mushrooms Demystified
64% (4)
Recognized by sight
28% (1)
Recognized by sight
85% (1)
Recognized by sight

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= Observer’s choice
= Current consensus


Add Comment
Comments valid, Debbie
By: Daniel B. Wheeler (Tuberale)
2009-01-22 17:01:51 HST (-1000)

But they also don’t apply to Oregon as yet. I believe that the Washington Amanita was A. virosa, which also has not been found in Oregon to date. That was is specific, apparently, to chestnut, and has apparently been spread to Washington on the roots of chestnut trees imported from other locations.

True, Oregon hosts an extremely wide range of plant, shrub and tree species, and there are only so many mycologists locally to go around.

Nonetheless, it is probable that at sometime in the past someone would have collected A. phalloides if it actually occurred here.

just ‘cause phalloides hasn’t been seen in an area doesn’t mean that it won’t pop up, someday..
By: Debbie Viess (amanitarita)
2009-01-15 06:27:28 HST (-1000)

the species is invasive and spreading, and occurs with many different types of trees, from live oak to chestnut to pine to eucalyptus! expect the unexpected, just be prepared to be able to document your find, with photos and dessicata!

as to the ID of this particular mushroom…absolutely NOT a smithiana…the volva is membranous, not cottony, friable or warted. it is most likely one of the coccoras, but again, not enough details from this one photo to tell.

A. phalloides not known from Oregon
By: Daniel B. Wheeler (Tuberale)
2009-01-14 21:12:17 HST (-1000)

However, an Amanita found with chestnut has been found across the Columbia River in Clark County, Washington. Knowing nearby trees would cinch what this probably is. If it didn’t have a strong odor of matsutake, it could still be a small button of Amanita smithiana, which does not always have distinctive scales on the cap.

not phalloides
By: Debbie Viess (amanitarita)
2009-01-12 15:26:40 HST (-1000)

not sure what you have here, but if the orientation of the button that you found is correct (ie, you have it out of the ground the same way that it was growing) it can’t be phalloides; phalloides buttons are always wider at the base than they are at the top.