Observation 118131: Amanita pantherina (DC.) Krombh.

When: 2012-11-27

Collection location: SE 76th and Division, Portland, Multnomah Co., Oregon, USA [Click for map]

Who: Daniel B. Wheeler (Tuberale)

No specimen available

Same clump as obs. 117810 taken 11/24. This collection is starting to show some orange-brown as well as brown. It is also showing more predation, possibly from squirrels. Some Amanitas in Oregon have now been shown to hybridize, according to Dr. Lorelei Norvell and Janet Lindgren, making the Amanitas especially difficult to sort. According to toxicolgy reports, this fungus is responsible for more mushroom poisonings in Oregon than any other species.

On 11/24, specimens were small, golf-ball sized buttons. Today the buttons have enlarged considerably, with some larger than softball size. A total of nearly 15 specimens were clumped in close proximity to each other. Several appear to have been cut at ground level.


Two larger buttons showing dark brown. The specimen on the left has a barely visible volva top visible.
Associated with beech, as the leaf in the background suggests.
A specimen I cut in half on 11/24 shows the curious remains of the veil.
Button with some orange-tan on the cap. Also visible are more beech leaves, and the extreme top of the volva.
The specimen with the most orange in it.
Two more buttons, one showing animal predation. (See the tooth marks?)

Proposed Names

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Used references: Arora, Mushrooms Demystified.

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Add Comment
Agreed, Ret!
By: Daniel B. Wheeler (Tuberale)
2012-11-27 18:36:03 EST (-0500)

I didn’t take a panoramic shot of all the sporocarps, but they are all within a 2 square meter space at the base of a single beech tree. I think they may well be variations of the same species.

There are about 15 beech trees in this block. Only this particular beech tree has these Amanitas fruiting at this time.

At least one of the caps has a “butterscotch” color on
By: R. E. Tulloss (ret)
2012-11-27 18:13:27 EST (-0500)

the pileipellis.

This suggests one of the taxa that Murrill described from the Pacific NW…such as A. pantherinoides (which Jenkins thought might be the same as Murrill’s A. praegemmata).


Created: 2012-11-27 15:41:23 EST (-0500)
Last modified: 2016-10-18 15:12:21 EDT (-0400)
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