Observation 97622: Stropharia hornemannii (Fr.) S. Lundell & Nannf.

When: 2012-06-10

Collection location: Sierra Co., California, USA [Click for map]

39.6285° -120.649° 1890m

Who: Debbie Klein (dejaklein)

Specimen available

I found these near Packer Lake, on a trail between Packsaddle Campground and Deer Lake, near the start of the trail.

I took it to Else Vellinga, who looked at it and wrote: “I looked at the specimen; it has an ixocutis, acanthocytes on the basal mycelium, and chrysocystidia in the hymenium – so it must be a Stropharia!”


Copyright © 2012 Dimitar Bojantchev
Acanthocytes – spiny star-like cells on the basal mycelium
Copyright © 2012 Dimitar Bojantchev
Copyright © 2012 Dimitar Bojantchev
Copyright © 2012 Dimitar Bojantchev

Proposed Names

64% (4)
Eye3 Eyes3
Used references: Debbie Viess suggested this ID, and it looks like description on MushroomExpert.Com

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

Eye3 = Observer’s choice
Eyes3 = Current consensus


Add Comment
Photo posted
By: walt sturgeon (Mycowalt)
2012-06-25 11:44:59 CDT (-0400)
Let’s see
By: Irene Andersson (irenea)
2012-06-24 16:03:51 CDT (-0400)

if the link works to Farlow’s icon of Stropharia subcaperata..

I have a slide
By: walt sturgeon (Mycowalt)
2012-06-24 13:31:18 CDT (-0400)

but no scanning capabilities at present. The color lacked brown or wine colors.
It was buff as I recall. Just a variety of S. hornemanii I now think.

nope, nobody noticed! ;)
By: Debbie Viess (amanitarita)
2012-06-24 13:09:59 CDT (-0400)

did you get a photo of your purported subcaperata, and how did you distinguish it from hornemannii?

it does get listed as a species on the Quebec site, but there are no photos.

Just checking
By: walt sturgeon (Mycowalt)
2012-06-24 12:56:57 CDT (-0400)

to see if anyone would notice. I think these two are probably synonyms. I did not know that there might be a habitat difference. I once found a pale collection which I keyed out somewhere to S. subcaperata. It was in a mixed woods with Hemlock and White Pine.

couldn’t find a photo of subcaperata anywhere online…
By: Debbie Viess (amanitarita)
2012-06-24 12:06:41 CDT (-0400)

but here is a very nice series of hornemannii photos, again from the hardworking and talented Quebec group, largest Myco society in NA. It probably has the largest component of talented club taxonomists, too! ;)


ah, another species heard from!
By: Debbie Viess (amanitarita)
2012-06-24 12:02:49 CDT (-0400)

I dunno Walt, maybe not, if you take habitat into account.

Got a photo of this creature?

Here is a description from the Quebec myco-group online of both species descriptions. Hornemanii is associated with conifers (like Deb’s specimen,
subcaperata with hardwoods.

More micro details from the gills would help, too.

Below key detail, from Roland on the Champignons du Québec (2199 species)Flickr group, was run through the Bing translator, so take it with a grain or block of salt. ;)

9 Cool, cream, brownish or pinkish-reddish-brown viscous hat-.
Tre-purple; foot with fuses or white scales in the ring; Cys-
These lamellar tides; growing on coniferous wood or near…
………………………………………………………………… Stropharia hornemannii

9 Hat viscidule cool, fast dry, cream, brownish or fauvatre pa -
the; foot with darker under the ring, scales ocher fauvatre. cysti-
a lamellar absent; growing in deciduous forest…
………….…………………………..……….… (1) Stropharia subcaperata

Previous Sierra Siting -
By: Debbie Klein (dejaklein)
2012-06-24 10:49:53 CDT (-0400)

Fred Stevens wrote to me that he found this species once in the Fall in the area of the SFSU Field Campus, in a “year that the Fall rains came early, and the collecting was extraoridinary.”

Images added of acanthocytes
By: Debbie Klein (dejaklein)
2012-06-22 11:00:04 CDT (-0400)

I added images of acanthocytes on the mycelia of this specimen, photographed by Dimitar Bojantchev. Dimitar wrote, “Acanthocytes are these spiny cells attached to the outer surface of the mycelia of some species – they are very brittle and tend to be covered by soil particles that really stick to them, so getting a good shot is not easy, so do not mind my crude photos.”

Created: 2012-06-17 13:16:46 CDT (-0400)
Last modified: 2012-06-25 16:45:51 CDT (-0400)
Viewed: 309 times, last viewed: 2018-01-14 03:02:46 CST (-0500)
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