Observation 58364: Amanita porphyria Alb. & Schwein.

When: 2010-11-09

Collection location: Mendocino, California, USA [Click for map]

Who: Ryane Snow (snowman)

No specimen available

Proposed Names

5% (2)
Used references: MD p.279; found in mixed conifer forest <1 mile inland; abrupt basal volva is cleft and shows some reddish brown staining
76% (2)
Recognized by sight

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Eye3 = Observer’s choice
Eyes3 = Current consensus


Add Comment
split bulb on…
By: R. E. Tulloss (ret)
2010-11-09 11:04:05 PST (-0800)


I noticed that the underside of the annulus is gray in the first photo and there appear to be gray remains of the universal veil on the stem. I think that you might consider Amanita porphyria as a possibility.

In the east, we often see specimens of the “citrina-group” with vertical splitting on the bulbs especially when the bulbs are firmed up very tight in a moist environment.

The abruptness of the bulb in _brunnescens is more pronounced than in this specimen (the edge of bulb’s top is near or at the broadest point of the bulb in brunnescens); and brunnescens would develop distinct staining around all the insect damage.

So far as I know at the moment, _brunnescens only occurs in eastern North America.

So I am inclined to vote for porphyria.

Very best,


Created: 2010-11-09 09:46:02 PST (-0800)
Last modified: 2010-11-30 15:11:15 PST (-0800)
Viewed: 31 times, last viewed: 2017-06-08 02:39:11 PDT (-0700)
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