Observation 54883: Entoloma violaceum Murr.

When: 2010-10-02

Collection location: Luzerne Co., Pennsylvania, USA [Click for map]

Who: Dave W (Dave W)

Specimen available

Cap color was dark purplish. Largest caps about 2 inches diameter. Gills deeply notched to sinuate. Found in mossy area of lawn.

Audubon lists P. nodospora as having 6 to 8 sided spores.

Proposed Names

29% (1)
Recognized by sight: Scaly caps with patches of hairs on stipes.
Used references: Audubon
Based on microscopic features: Polygonal spores mostly 5 or 6 sided.
63% (3)
Recognized by sight
77% (2)
Recognized by sight
64% (2)
Used references: DNA sequencing as indicated in the comment section

Please login to propose your own names and vote on existing names.

Eye3 = Observer’s choice
Eyes3 = Current consensus


Add Comment
You make a good point Irene ..
By: Linas Kudzma (baravykas)
2014-12-09 10:29:31 CST (-0600)

very very few of my Northeastern USA Entoloma collections have close sequences in Genbank and it may be that invalid use of European names is common in the cases that are in Genbank.

In any case, I am documenting what I’m finding as best as I can.

Are sequences available…
By: Dave W (Dave W)
2014-12-07 07:30:45 CST (-0600)

for NA collections of what is currently called Entoloma violaceum?

I’m not confident
By: Irene Andersson (irenea)
2014-12-06 13:10:53 CST (-0600)

Remember that (Entoloma) porphyrophaeum is a Friesian species (means european..).
You can’t pick the name of just one collection with a similar DNA:

A sequence of an estonian collection is available at Unite, but it has only 88% similarity with Vilgalys & Redhead’s porpyrophaeum sequence at Genbank.
Which one do you think is most likely to be the true porphyrophaeum..?

Both are ..
By: Linas Kudzma (baravykas)
2014-12-06 08:57:27 CST (-0600)

very similar sequences and the identified one is uploaded by Vilgalys and Redhead, so I’d consider Trichopilus porphyrophaeus correct. Nice find Dave and the sample was in good shape. I’ll keep it safe.

I’ll send you some micro to post.

Nice work Linas!
By: Dave W (Dave W)
2014-12-05 12:35:09 CST (-0600)

I surmise that the “Unidentified Entoloma” mentioned in your comment likely represents T. porphyrophaeus.

The ITS sequence is available …
By: Linas Kudzma (baravykas)
2014-12-05 10:32:40 CST (-0600)

99% Match in GenBank to unidentified JN021014 Entoloma sp. and EF421111 Trichopilus porphyrophaeus.

This collection has been preserved.
By: Dave W (Dave W)
2014-04-17 10:07:06 CDT (-0500)

Available for study.

I think Trichopilus violaceus
By: Dave W (Dave W)
2010-10-10 10:26:44 CDT (-0500)

may be the same as Entoloma violaceum, which I suppose is now an outdated name (Audubon guide). The description in Audubon fits my collection very well… right down to the (predominantly) hexagonal spores.

First I’ve heard of the genus
By: Dave W (Dave W)
2010-10-04 23:08:32 CDT (-0500)

Trichopilus. But it looks like a very good fit for my collection seen here.

Created: 2010-10-04 21:56:19 CDT (-0500)
Last modified: 2014-12-06 20:30:14 CST (-0600)
Viewed: 206 times, last viewed: 2018-04-10 14:05:41 CDT (-0500)
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