Observation 8001: Ripartites borealis T. Ulvinen ined.
When: 2007-09-18
Herbarium specimen reported

Notes: I thought it could be a good idea to add pictures of another Ripartites, to show how much they remind of a Lepista. When I found it, I was working in that direction for several days without success, until I saw the darkened gills.

This one is (by many authors) synonymized with Ripartites tricholoma – something I can’t accept. As long as these authors don’t describe them with larger caps than 4 cm, I find it hard to beleive that they have ever seen this species..

The habitat is an old Pine forest, where the ground was burnt less than 20 years ago. Other species at the site were Boletopsis grisea, Tricholoma matsutake, Tricholoma focale, Bankera fuligineoalba, Tricholoma apium, Lactarius musteus and Hydnellum caeruleum.

Proposed Names

28% (1)
Recognized by sight: Soft and fleshy fruitbodies, gills decurrent. The large cap is 7 cm.
Used references: Nordic Macromycetes, Flora Agaricina Neerlandica
Based on microscopic features: Pale brown spores, rounded with warts, 3,5-4 × 3 μm.
61% (2)
Eyes3
Recognized by sight: After correspondence with finnish mycologists

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Eye3 = Observer’s choice
Eyes3 = Current consensus

Comments

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The odor
By: Irene Andersson (irenea)
2010-05-13 17:17:38 CDT (-0400)

wasn’t strong, but clearly farinaceous. I guess it could easily be mistaken for Clitopilus prunulus without a closer look. It has the same kind of soft texture (but is not as brittle).

so do they ahve a particular odor?
By: Johannes Harnisch (Johann Harnisch)
2010-05-13 12:53:05 CDT (-0400)

the first picture looks similar to Clitocybe
but not the second…I know it’s not though.
This is an interesting find!~

It’s a bit annoying
By: Irene Andersson (irenea)
2010-05-13 08:09:32 CDT (-0400)

that Ripartites borealis is a well known species in Finland, but still unpublished. According to Esteri Ohenoja, this one fits well with the looks and habitat of R. borealis, a rare species with a northern distribution.

Fries’ original description of Agaricus helomorphus (included in his section “Flammula”) lead to different interpretations, but is now accepted as a Ripartites with a nude and more conical/umbonate cap than the common R. tricholoma (small specimen illustrated in Lange’s “Flora Agaricina Danica”).
It’s impossible to find a photo of helomorphus, published by anyone who has an idea of what it actually is – but here’s one that has been ID:ed as helomorphus by european experts, it can grow quite big, seen up to 12 cm:
http://www.toxino.com/...

I don’t know what to think about these forms, I was hoping that collections of helomorphus/borealis/tricholoma would be studied better by those who have the needed equipment..

Interesting -
By: Douglas Smith (douglas)
2008-06-19 07:56:33 CDT (-0400)

Neat – thanks for the photo and the comments. Learning something more about this genus.

Created: 2008-06-19 04:54:59 CDT (-0400)
Last modified: 2010-05-13 12:51:14 CDT (-0400)
Viewed: 208 times, last viewed: 2016-10-29 17:37:19 CDT (-0400)
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