Observation 114261: Armillaria (Fr.) Staude

When: 2012-10-16

Collection location: Diamond and Crater Lake, Oregon, USA [Click for map]

Who: Ron Pastorino (Ronpast)

Specimen available

These were growing in clusters on the ground or buried wood among mixed conifers @ ~ 3800 ft.
Caps were up to 11 cm across and were hygrophanous.
The gills were buff to sl. pinkish and were subdeccurent to decurrent.
Stems darkening toward the tapering base.
No strong odor and did not taste.
Spore print was white, inamyloid and smooth spores ~ 7.0-10.0 X 5.7-7.2 microns, usually with one large oil droplet(in Melzers).

Proposed Names

77% (2)
Recognized by sight
30% (2)
Recognized by sight: Gills subdecurrant
Based on microscopic features: Spore size similar, hyaline, smooth, inamyloid with a conspicuous hilar appendage
57% (1)
Recognized by sight
Based on microscopic features

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Eye3 = Observer’s choice
Eyes3 = Current consensus


Add Comment
I think
By: Christian (Christian Schwarz)
2012-10-23 00:07:47 CDT (-0400)

A. nabsona should be on Alder wood…

According to the original description
By: Alan Rockefeller (Alan Rockefeller)
2012-10-23 00:01:12 CDT (-0400)

they can have subdecurrent gills. While it doesn’t say they are clustered, it says gregarious, and clustered isn’t that far away, especially given Armillaria’s tendency to cluster in general.

Yes Alan,, I wanted to call
By: Ron Pastorino (Ronpast)
2012-10-22 23:33:15 CDT (-0400)

them Armillaria nabsnona but the decurrent gills and clustering is holding me back.

Created: 2012-10-22 19:43:26 CDT (-0400)
Last modified: 2012-10-23 00:27:50 CDT (-0400)
Viewed: 109 times, last viewed: 2017-11-30 00:59:33 CST (-0500)
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