When: 2009-09-19

Collection location: Ryerson Station State Park, Pennsylvania, USA [Click for map]

Who: Dan Molter (shroomydan)

No specimen available

There were a large number of white aborts growing in with a large number of honey mushrooms around a dead elm tree. I found only one small Entoloma growing in with them.

Species Lists


Proposed Names

64% (3)
Recognized by sight
73% (2)
Recognized by sight: Actually this is a twofer. My Mycology students can get credit for two species by identifying both. It is the A gallica that is being aborted by the Entoloma abortivum. This is pretty typical A. gallica, single or in small groups with a bulbous base. Some European authors amke a big deal about some yellow color on the fb, but in North America the yellow color is pretty variable or not there at all. See http://botit.botany.wisc.edu/toms_fungi/sep2006.html
-62% (2)
Recognized by sight
-86% (1)
Recognized by sight: If this were an observation of E. abortivum, then I would say “I’d call it that”.

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= Observer’s choice
= Current consensus


Add Comment
no, you’re right
By: Danny Newman (myxomop)
2016-07-06 15:29:32 CDT (-0500)

if another observation exists for whatever second (or third) species is shown in the photo, then this ob should not be called Mixed collection. i just didn’t see any indication that the “mixed-ness” of the photo had been acknowledged and addressed with the creation of separate observations. maybe put some links to any companion obs in the notes.

This is an observation of the honey mushrooms
By: Dan Molter (shroomydan)
2016-07-06 15:20:22 CDT (-0500)

I’m not disputing the claim that more than one species is present. I made another observation of the Entolomas. This observation is of the Armillaria. Again, “mixed collection” is not wrong; it’s just not helpful.

how are these
By: Danny Newman (myxomop)
2016-07-06 15:17:17 CDT (-0500)

not different spp.?

mixed collection
By: Dan Molter (shroomydan)
2016-07-06 15:15:50 CDT (-0500)

I’m voting “mixed collection” as if, because it does not help people find a good example of this parasitic/symbiotic fungus. “Mixed collection” is not wrong, it’s just not helpful.

We could name every fungus on a fungus a mixed collection, but that only serves to muddy the waters.

The globs
By: Dave W (Dave W)
2009-09-23 10:43:05 CDT (-0500)

are often called the aborted form of Entoloma arbortivum. But, I believe that the current status regarding the understanding of this phenomenon is that the globs are actually aborted forms of the Armillaria fruit bodies which have been attacked by E. abortivum. The small Entoloma is probably E. abortivum. I snapped an in situ photo of this arrangement last weekend, and will likely post soon.