Observation 22395: Leratiomyces percevalii (Berk. & Broome) Bridge & Spooner

When: 2009-04-02

Collection location: Golden Gate Park, San Francisco, California, USA [Click for map]

Who: Micah Courteau (waynegrompsky)

No specimen available



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Eye3 = Observer’s choice
Eyes3 = Current consensus


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By: Andreas Gminder (mollisia)
2009-06-22 03:06:25 PDT (-0700)

I’m just separating a part of my material and wait for your adress.

By: Erin Page Blanchard (CureCat)
2009-06-21 23:53:33 PDT (-0700)

These are rather prolific here, especially found in wood chipped areas,

I don’t have a microscope actually, but hopefully I will be able to get one not too long in the future. I have a number of friends with microscopes as well, so I’m sure I or someone would be able to check these out if you are willing to send a sample.

I am not sure if I have a collection of the taxon in my area, but I can look through my collections and see. I think I may, in which case I can see about sending you some if you would like.

Thank you, I will e-mail you with more details.

By: Andreas Gminder (mollisia)
2009-06-21 23:36:23 PDT (-0700)

So I have to broaden my conception of L. percevalii. You are surely right and you have more experience with this species than I have. In Germany it is found only since a few year, for my county (Thüringen) the collection I show in MO from 2005 was the first finding.
What concerns the identity of american and european collections, it would perhaps be interesting to compare specimens. If you wish, I can send you some of my material

L. percevalii
By: Erin Page Blanchard (CureCat)
2009-06-21 17:30:18 PDT (-0700)

The species referred to as L. percevalii that grows here has a range of forms- some looking much like the mushrooms in the observation you posted, with more yellow or beige pigment, a more orange or brown base of the stipe, sometimes little brown speckles on the pileus, with white veil fragments along the margin, and mottled grey lamelle.

Some are far more pale, with a long, often irregular, twisting stipe.

Some are VERY umbonate to the point of having a sharp point or even a conical shape, while others are completely rounded or flat at maturity!

So there is a lot of variation. I would say that this collection is almost certainly the species found in California that is currently referred to as L. percevalii…
The question in my mind is whether or not the European and American species are the same. My guess is that they are different, yet most closely related.

By: Andreas Gminder (mollisia)
2009-06-21 12:15:29 PDT (-0700)

I don’t see much ressemblance with what we here in Europe determine as Leratiomyces percevalii. It should be an ochraceous species, with a often thickset stipe which is ochraceous too and becomes more rusty orange at the base. There are also slender and paler fruitbodies in the collections, but the stipe don’t pleases me nevertheless.
For comparism one find from Germany: http://mushroomobserver.org/22420?search_seq=542622

Created: 2009-06-20 23:59:29 PDT (-0700)
Last modified: 2009-06-20 23:59:29 PDT (-0700)
Viewed: 56 times, last viewed: 2017-10-14 17:11:21 PDT (-0700)
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