When: 2011-08-17

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

Who: Hamilton (ham)

Specimen available

Growing near beech trees. Caps up to about 1.5 cm wide.


Proposed Names

28% (1)
Recognized by sight
56% (1)
Used references: Christian
52% (1)
Recognized by sight

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

= Observer’s choice
= Current consensus


Add Comment
By: Dimitar Bojantchev (dimitar)
2011-08-20 17:11:59 CDT (-0400)

I had to cancel two trips to Boston, including on for Sep. 5 this year, as my plans got rearranged and I have to be in Europe. There so much work to be done in the East, particularly away from the conifer belt. The SE of the USA is the least studied in that group and my several collections have been very interesting. But, I do want to collect in Cape Cod with you Noah, as well as in the mountain areas of the Adirondacks, the Green Mountain and possibly all the way to Quebec.

Hamilton, thank you — I will let you uknow when I do basic microsocpy first.

I’ll be sending them
By: Hamilton (ham)
2011-08-20 16:31:16 CDT (-0400)
By: Noah Siegel (Noah)
2011-08-20 07:14:27 CDT (-0400)

Lots of this out in MA at the moment, I have a collection that I can send.
You should come east, Corts are starting, lots up…

/anomalus clade
By: Dimitar Bojantchev (dimitar)
2011-08-20 03:51:46 CDT (-0400)

The talk of C. azureus is correct only as far as the general affinity to the Anomali group. But that group is very complicated and the purely morphological approach cannot do it justice. If I had to guess, I’d agree with Irtene that this collection is in the group. It is very unlikely that this species is described – I have to do one more pass of Peck and Kauffman, but the East Coast cortinarii are very diverse poorly studied. Luckily Murrill didn’t get too excited about them and his damage is limited to Florida only.

The human-erected notion of Sericeocybe is totally confused now that we know better. There are a lot of species in that group, which are only as similar in origin as the dolphins and sharks, despite the morphological simulates driven by habitat adaptation.

Glad to see that material has been preserved – Hamilton, send it along IF YOU get a more representative collection containing several basidiomata.

We need to start specifying clades on MO – the preferred /xxxxx format is generally accepted elsewhere.


By: Hamilton (ham)
2011-08-19 14:48:46 CDT (-0400)

Cortinarius azureus looks close, but my gut says probably not. I’ll post a few more pics of this cort after work.

By: Irene Andersson (irenea)
2011-08-19 14:32:38 CDT (-0400)

Cortinarius azureus..? A species that has been interpreted in different ways, at least it’s a small and blue one.

By: Hamilton (ham)
2011-08-19 13:52:37 CDT (-0400)

Sorry but I don’t see anything that looks like chevrons on the stipe. More like silky, irregular bits of whitish material that are powdered rusty with spores. I don’t really see any similarity to C. caninus at all, honestly. These are the smallest Cortinarius I’ve ever seen with my own eyes.

This species doesn’t seem to be very abundant. I found three of them along roughly a quarter mile of a stream. They are tough to see because of their small size. I have two of them if anyone would like to take a look.

is anyone doing a serious study of corts in the east?
By: Debbie Viess (amanitarita)
2011-08-19 11:40:58 CDT (-0400)

otherwise…could be grim getting a name for this interesting mushroom.

love the dangling threads of cortina on the caps edge. ;)

doesn’t look a bit like other examples of Cort caninus (see other MO sightings from Europe, primarily) but I can offer no other, better name.

By: Christian (Christian Schwarz)
2011-08-19 10:50:15 CDT (-0400)

It’s a Sericeocybe. I found quite a bit of something like this in the southern Adirondacks last week, and one name that a local person was applying to it was C. caninus. I don’t invest much confidence in any colloquial American Cort names without microscopy, though.

He was noting in particular the presence of bands or ‘chevrons’ of tan veil tissue on the stipe. It sort of looks like that feature is present here – did you notice it?