Observation 25213: Armillaria gemina Bérubé & Dessur.
When: 2006-09-05
No herbarium specimen


[admin – Sat Aug 14 01:57:45 +0000 2010]: Changed location name from ‘Adirondack Park, near Paul Smiths, Franklin Co., New York, USA’ to ‘near Paul Smiths, Adirondack Park, Franklin Co., New York, USA

Proposed Names

41% (1)
Used references: Going by Tom Volk’s key to American Armillarias, this is a more likely name, can’t be sure from just a photo though. Definitely not A. mellea though. Could also be A. sinapina, need more than a photo for a positive ID.

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Eye3 = Observer’s choice
Eyes3 = Current consensus


Add Comment
By: I. G. Safonov (IGSafonov)
2009-09-19 22:58:56 CDT (-0400)

Thank you, Tom, for taking a detailed look at these Armillarias. I uploaded the second picture after realizing that I had been taken only two minutes prior to the original one, so I am pretty sure it is the same species at different stages of development. I found these growing on a mossy log in an old growth forest just north of Paul Smiths, NY. I will be posting a few other Armillaria observations soon; your comments would be much appreciated — thanks.

not A solidipes
By: Tom Volk (TomVolk)
2009-09-19 21:20:22 CDT (-0400)

Armilaria solidipes (= A ostoyae) has pointed bases on the fruiting bodies because of being cespitose. these are not. I have not seen A gemina enough to know if they have pointed bases. This second picture looks more like A sinapina or A gallica.

not A. mellea
By: Tom Volk (TomVolk)
2009-09-18 21:17:19 CDT (-0400)

Agreed that it is too scaly. A. solidipes (-A. ostoyae) and A. gemina cannot be easily distinguished morphologically. I had to go back and look at my key http://botit.botany.wisc.edu/toms_fungi/armkey.html
A. gemina is known only from hardwoods, and upper NY is within the known geographic range. But A. sinapina also falls in this range. So I am not sure what this is. Armillaria species are still very difficult.

Alternative name
By: I. G. Safonov (IGSafonov)
2009-09-14 11:49:34 CDT (-0400)

Now I agree with JPDENK that this is not A. mellea — too dark and scaly. I investigated further by going to MushroomExpert.com. A better match appears to be A. ostoyae, which is morpholocially identical to A. gemina. Soon, I will be posting more pics of Armillaria sp. from different locations.

Created: 2009-09-14 00:38:25 CDT (-0400)
Last modified: 2011-03-13 12:05:39 CST (-0500)
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