Observation 24057: Amanita brunnescens G.F. Atk.

When: 2009-08-05

Collection location: Forest near Elgin St., Pembroke, Ontario, Canada [Click for map]

Who: Paul Derbyshire (Twizzler)

No specimen available

This is the big Amanita observation of the week. These brownish grey ones were everywhere: Zones 38, 40, 45, and 52 for sure, which covers perhaps half a square kilometer of woods, and probably also in other areas where I didn’t happen to go.

Cap: brownish to greyish, lighter at the margin, convex becoming flat, up to 6 cm across.

Gills: white, free.

Stipe: white, tall (up to 10cm), with a buried bulb at the base; young ones have a flaring membranous ring most of the way to the top.

Flesh: white.

Sometimes these occurred in small groups scattered over a few square feet; in Zone 40 I found at least six in a fairly small area, of which four are represented by photos here.

Species Lists


Zone 38
Zone 38
Zone 38
Zone 38
Zone 40, specimen 1
Zone 40, specimen 1
Zone 40, specimen 1
Zone 40, specimen 1
Zone 40, specimen 2
Zone 40, specimen 1
Zone 40, specimens 3 and 4
Zone 45
Zone 52

Proposed Names

57% (1)
Recognized by sight: Free white gills, bulb at base of stem, membranous ring on younger specimens.
91% (6)
Eye3 Eyes3
Recognized by sight

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Eye3 = Observer’s choice
Eyes3 = Current consensus


Add Comment
Name Proposal
By: Patrick Harvey (pg_harvey)
2009-08-07 11:20:21 CDT (-0400)

Right, I was thinking A. rubescens – and also didn’t clue into the ring!

pretty obviously a brunnescens.
By: Debbie Viess (amanitarita)
2009-08-07 10:16:46 CDT (-0400)

brownish cap in thumbnail, plus fibrous nature to cap plus abrupt bulb, which often splits. this one is now in section validae (like rubescens).

can’t be a grisette with an annulus, no matter whether it has striations (in age) or not.

Amanita volvata is a whole nuther critter in section amidella.

Noah nailed it.

By: Patrick Harvey (pg_harvey)
2009-08-07 10:06:42 CDT (-0400)

Was there any staining brown or maroon when this one was cut or damaged? I don’t see any in the photos. I was going to suggest some kind of brown-capped
grisette (A. volvata), but I also don’t see any striations on the edge of the

Created: 2009-08-07 00:54:13 CDT (-0400)
Last modified: 2011-07-03 23:11:23 CDT (-0400)
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