Observation 84761: Armillaria (Fr.) Staude
When: 2011-12-17
No herbarium specimen

Notes: I was fairly sure these were something in the Armillaria mellea group, but the cortinate partial veil gives me reason to wonder if it’s a Cortinarius with very pale gills and somewhat scaly cap.

The last picture was a couple of older specimens where the gills were taking on an almost greenish hue.

Proposed Names

-18% (3)
Recognized by sight
71% (5)
Recognized by sight: Maybe something close to A. gallica, which has the cortinate veil? The discoloring of mature gills is common in these types.
63% (4)
Recognized by sight: Reminds me of these: mushroomobserver.org/obs/13071
which were also found in very dry weather.

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Eye3 = Observer’s choice
Eyes3 = Current consensus


Add Comment
Assigning a species name…
By: Dave W (Dave W)
2011-12-20 06:44:19 PST (-0800)

to a given Armillaria collection (especially in a geographic area where occurrence is deemed “rare”) would sometimes seem to be a rather dubious enterprise… unless there is a convincing piece of evidence. In the case of the observation at hand, the collector reports “It wasn’t connected to wood or roots, it was attached to decomposing leaf matter.” Within Tom Volk’s article linked directly below, one finds the following statement. “…A. gallica is usually an innocuous saprophyte, living on organic matter in the soil…”


Armillaria gallica
By: walt sturgeon (Mycowalt)
2011-12-19 12:02:56 PST (-0800)

It has been reported by Tom Volk as rare in the Pacific Northwest.

How firm is that distribution information?
By: Tom (LanLord)
2011-12-19 11:53:19 PST (-0800)

In the link provided, it states East of the Rockies. These were found within 10 miles of the Pacific ocean.

just wondering if perhaps that(this?) species is of broader distribution than M. Kuo states or if perhpas this observation is still not completely IDd?

check out…
By: Richard and Danielle Kneal (bloodworm)
2011-12-19 11:37:18 PST (-0800)
one more photo added
By: Tom (LanLord)
2011-12-19 08:16:05 PST (-0800)

It doesn’t clearly show the base of the stipe, but I believe it shows it better than any of the previous pics did.

The base was slightly enlarged versus the rest of the stipe, it was also bright golden yellow. It had a lot of leafy material adhering to it, from what the mushroom was growing out of – it wasn’t connected to wood or roots, it was attached to decomposing leaf matter.

By: Richard and Danielle Kneal (bloodworm)
2011-12-18 19:28:21 PST (-0800)

the stipe bases swollen or enlarged?

There were no spores near any of these
By: Tom (LanLord)
2011-12-18 18:34:10 PST (-0800)

Well, none of the white frosting that I’d expect from Amillaria, however, it’s been really dry here and that may have interfered with spore production.

The vertically cut cross section
By: Dave W (Dave W)
2011-12-18 07:51:44 PST (-0800)

looks very much like Armillaria… stipe with whitish stuffing discoloring to brownish inside a thin outer skin. Armillarias are generally not stingy with their white spores.

Created: 2011-12-17 14:33:22 PST (-0800)
Last modified: 2013-11-23 06:14:50 PST (-0800)
Viewed: 168 times, last viewed: 2016-10-28 14:51:37 PDT (-0700)
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