Observation 68630: Peziza Dill. ex Fr.

When: 2011-06-04

Collection location: Nevada City, California, USA [Click for map]

Who: Daniel Nicholson (danmadrone)

No specimen available

Looks like Peziza repanda except set in soil though wood chips present. Lighter colored slightly condensed growth (its been cold) and even off white at the base. So I looked into P. arvernensis which seemed a good match. But while the asci tips are showing slightly amaliod, the mature spores are smooth (not ornamented) and have two significant equal oil drops within most spores. this doesnt fit therein. Any ideas? literature seacrch, i’m working with it still.

Species Lists



Proposed Names

53% (4)
Used references
47% (2)
Recognized by sight

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Eye3 = Observer’s choice
Eyes3 = Current consensus


Add Comment
By: Drew Parker (mycotrope)
2011-07-19 05:58:54 BST (+0100)

It could be petersii, but petersii and proteana are remarkably similar microscopically. Dimitar’s reported spore size would not disqualify either.

Peziza petersi
By: Darvin DeShazer (darv)
2011-07-18 20:54:14 BST (+0100)

Roger’s Mushrooms
Tylutki reports this fungus from the Pacific Northwest.

Inspected the material…
By: Dimitar Bojantchev (dimitar)
2011-07-18 20:27:47 BST (+0100)

I inspected the material that Dan sent me. It is a Peziza, no doubt about it, but the specimen was quite immature and there were fewer mature spores than normally seen. The few mature spores that I saw were not smooth though. I posted spore photos on MushroomTalk, I hope that Dan can add them here. The spores i saw were in the 11-12 × 5-7 microns range, which is a bit small, but not uncommon size for Peziza. I find it hard to judge if these were the max size these spores reach and thus even harder time to settle on a species name.


to Dimitars lab
By: Daniel Nicholson (danmadrone)
2011-07-05 15:38:19 BST (+0100)

I’ll send you a specimen Dimitar, and get moving on some calibration for my scope in the meantime. since there are 50+ species of peziza in the UK alone it may be moot to investigate further but I’m game.

Couldn’t be…
By: Dimitar Bojantchev (dimitar)
2011-07-05 07:49:39 BST (+0100)

Couldn’t be proteana – the spores as described do not match.

Dan, I volunteer to do some microscopy and present it here. We need facts.


P. proteana
By: Drew Parker (mycotrope)
2011-07-05 07:32:41 BST (+0100)

Doesn’t look too far off in these images, though the spores are distinctly elliptic and minutely roughened.


Can I inspect this collection?
By: Dimitar Bojantchev (dimitar)
2011-07-05 07:08:12 BST (+0100)

Dan, this is becoming interesting – I think we need a second pair of eyes to evaluate this collection. Can you send me a piece when you have a chance – at least I will measure the spores precisely (photograph too). I will report immediately once I get it.


By: Darvin DeShazer (darv)
2011-07-05 06:42:02 BST (+0100)

In Tylutki, using your spore info it seems to key out as Peziza domiciliana and Peziza petersi is also a choice if the spores are minutely verrucose. (Sometimes hard to see) Spore size would help.

Tylutki, E. E. 1979. Mushrooms of Idaho and the Pacific Northwest Discomycetes. Univ. Press of Idaho, Moscow, Idaho. 133p.

Why not…
By: Dimitar Bojantchev (dimitar)
2011-07-05 06:25:38 BST (+0100)

Helvella leucomelaena?

elliptic spores
By: Daniel Nicholson (danmadrone)
2011-07-05 05:56:05 BST (+0100)

I understand that plicaria has round spores, they are somewhat elliptic. so it isnt a perfect fit. therein I am only partly the way there with resolution. apparently the granules on exterior point towards plicaria.

By: Drew Parker (mycotrope)
2011-07-05 05:21:17 BST (+0100)

Are they round or elliptic?

taking advice
By: Daniel Nicholson (danmadrone)
2011-07-04 23:51:22 BST (+0100)

Dennis Desjardin thinks tis is a Plicaria most likely. I’m grateful to get another opinion that shows potential.

different creature
By: Daniel Nicholson (danmadrone)
2011-06-07 05:17:15 BST (+0100)

I’m parking this one for now. But want to say it is hard to see anything that describes this species so any similar observations are greatly appreciated. this is undescribed in anything around I’ve seen….yet.

Can’t be proteana
By: Dimitar Bojantchev (dimitar)
2011-06-05 06:14:23 BST (+0100)

Dan, I trust you about the amyloid tips. Then it is Peziza sp. Just look at photographs of P. proteana, it does not look like it.

Potential in P. proteana
By: Daniel Nicholson (danmadrone)
2011-06-05 06:02:41 BST (+0100)

Peziza proteana keyed in good ’ol MD… “two smallish but 2 oil drops”. And isnt as violet. This thing has amaloid tips. No spore measurements I dont have it set up yet to be calibrated.

Peziza ampelina perhaps?
By: Dimitar Bojantchev (dimitar)
2011-06-05 00:16:24 BST (+0100)

That’s one of the few choices with two gutules.

Created: 2011-06-04 22:42:44 BST (+0100)
Last modified: 2012-01-27 04:13:27 GMT (+0000)
Viewed: 332 times, last viewed: 2018-11-17 05:11:13 GMT (+0000)
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