Observation 204871: Helvella rivularis

When: 2015-05-23

Collection location: Henry Cowell Redwoods State Park, Santa Cruz Co., California, USA [Click for map]

Who: Thomas Laxton (Tao)

No specimen available

Proposed Names

21% (2)
Recognized by sight: I found these growing on the same hill side on 02/15/2015: http://mushroomobserver.org/198899?q=2ZTJX
40% (2)
Recognized by sight

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Eye3 = Observer’s choice
Eyes3 = Current consensus


Add Comment
By: Thomas Laxton (Tao)
2015-05-24 17:45:27 EDT (-0400)

Yes I have specimens from both flushes this year and yes I can send you some.

By: Nicolas VAN VOOREN (NicoV)
2015-05-24 15:07:30 EDT (-0400)

The spores are not really significant for separating these two species. The cells of the outer surface are more informative and also the type of pigment on these cells.
Note also that H. cupuliformis has a pure white stipe. You can see typical collections of the latter on my website: http://www.ascomycete.org/...

By: Thomas Laxton (Tao)
2015-05-24 14:07:26 EDT (-0400)

I have micro from the first observation I found at this spot. The spores look like a match for Helvella cupliformis. It may be a variant.

More probably Helvella rivularis
By: Nicolas VAN VOOREN (NicoV)
2015-05-24 12:28:32 EDT (-0400)

I know quiet well H. cupuliformis, and in my opinion your fungus is too dark. It looks more like Helvella rivularis Dissing & Sivertsen. Of course microscopic data are required to be sure… If you find again some specimens, please make an exsiccatum and send it to me ;-)
Clearly an interested species.

might want to save a few next time.
By: Debbie Viess (amanitarita)
2015-05-24 12:01:18 EDT (-0400)

this is an eastern NA species that has only been confirmed in Oregon. It would be good to check the micro, too.

Created: 2015-05-23 21:07:43 EDT (-0400)
Last modified: 2015-05-24 17:33:28 EDT (-0400)
Viewed: 91 times, last viewed: 2017-11-18 08:55:34 EST (-0500)
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