When: 2011-04-16

Collection location: Sauvie Island, Multnomah Co. & Columbia Co., Oregon, USA [Click for map]

Who: Sava Krstic (sava)

Specimen available

Growing in open spaces in a cottonwood forest, in grass and/or moss. Caps 2-5 cm, stem up to 7 cm long.

Spores 7-8 × 4.5-6 microns. No cystidia observed.

I came up with C. antracinus as the closest match using Ian Gibson’s MatchMaker. But I’m not sure that various colors mentioned in the description really match.

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Add Comment
By: Irene Andersson (irenea)
2011-05-10 03:35:55 CDT (-0400)

it’s a bit large, and very likely in need to be sequenced and described..

I also have to say that there are different interpretations of helobius too.
I found two sequences in GenBank. Both seem to be scandinavian – but they are not the same species, and I’m not sure that any of them is the true helobius. One of them is very close to scotoides (an arctic species), the other one is close to collections named erythrinus/vernus.

Too large for C. helobius?
By: Sava Krstic (sava)
2011-05-10 01:32:32 CDT (-0400)

Thanks, Irene. I’m reading the description of C. helobius (in Funga Nordica) and yes, most of the features agree. In the description, the spores are somewhat larger (8-9.5 × 4-5), and the cap is much smaller (4-15 mm).

This seems to be a common mushroom here and is the only Cort I’ve seen this Spring (so far). I collected it again on April 30. It would be good to know what it is.

It reminds
By: Irene Andersson (irenea)
2011-05-08 09:57:06 CDT (-0400)

very much of Cortinarius helobius, one of the few spring corts in Europe.
The shape of the spores, with tiny warts, is a match too.

Created: 2011-04-18 01:33:08 CDT (-0400)
Last modified: 2011-05-07 22:23:07 CDT (-0400)
Viewed: 412 times, last viewed: 2020-06-27 21:59:26 CDT (-0400)
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