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Helvella 0256
Sánchez Leandro, 09-06-2021 18:41
Sánchez LeandroBonsoir,
Sous Pinus uncinata, 1975 mts, jusqu'à 30 mm diamètre.
Croziers -
Amitiés.

  • message #69089
  • message #69089
Enrique Rubio, 10-06-2021 17:29
Enrique Rubio
Re : Helvella 0256
Hi Leandro
The absence of croziers and the habitus of your Helvella seem to lead us to the clade leucomelaena. But I do not know how to distinguish Helvella leucomelaena from Helvella confusa, a species that I do not know. Maybe one of our colleagues could clarify these differences.
Good luck!
Enrique
Sánchez Leandro, 10-06-2021 17:51
Sánchez Leandro
Re : Helvella 0256
Hi Enrique,
Thank you for your contribution, I´m in the same situation as you, I await opinions.
Regards
Enrique Rubio, 10-06-2021 17:55
Enrique Rubio
Re : Helvella 0256
As you say, they currently belong to the genus Dissingia.
Marek Capoun, 10-06-2021 23:13
Marek Capoun
Re : Helvella 0256
Hello Leandro and Enrique,
the occurence under Pinus and the scalloped margin, it suggests H. leucomelaena, I think...
Is it possible that the soil is calcareous?
Greetings,
Marek
Sánchez Leandro, 11-06-2021 14:48
Sánchez Leandro
Re : Helvella 0256
Hello Marek,
I don't know what kind of soil it is, sorry.
Regards
Mirek Gryc, 11-06-2021 19:30
Re : Helvella 0256
Hello everyone
In my opinion, this is definitely H. leucomelaena, I do not know another of such features.
H. Confusa has a stem clearly ribbed and the goblets opens much earlier. Besides, H. Confus prefers places more damp.
greetings
Mirek
Charles Aron, 11-06-2021 19:33
Charles Aron
Re : Helvella 0256

Hi All,


A few years ago I came across a Helvella on damp soil by the side of a small brook in Picea plantation close to limestone. To me, this seemed an unusual habitat for a Helvella and I expected a species new to me. Using the paper, Synopsis of the Saddle Fungi by Inger Skrede et al I arrived at H. confusa which is separated in the key  from Leucomelaena in having a distinct stipe. I sent some photos to Inger who confirmed the ID as Dissingia confusa, separated from Helvella in being without croziers (see 'Pindara revisited.....', again by Inger Skrede et al). The specimens looked a bit paler than leucomelaena and were less stocky. Also they lacked a crenelated margin. I have come across leucomelaena and the habitat was totally different-on sand under Pinus in coastal plantation. My spore dimensions were 19-25x15-17, so close to Leandro's although the confusa spores are more broadly ellipsoid.


Best wishes,


 


Charles.

  • message #69115
  • message #69115
  • message #69115
  • message #69115
Marek Capoun, 11-06-2021 20:36
Marek Capoun
Re : Helvella 0256
H. leucomelaena is also Dissingia currently a it's without croziers too, as Enrique writes above. And my experience with D. (H.) leucomelaena tells me that it grows up in the soil with a minimum of humus, and if present, then a thin layer of litter.
Sánchez Leandro, 12-06-2021 10:36
Sánchez Leandro
Re : Helvella 0256
Hello everybody.
First of all, thank you very much for your opinions.
It's difficult to separate both species.
I find it hard to believe that a species that we found on the same beach could be the same as this at 2000 meters of altitude
Regards




Nicolas VAN VOOREN, 14-06-2021 12:13
Nicolas VAN VOOREN
Re : Helvella 0256
To my opinion, Leandro's specimens are D. leucomelaena, first because it grows under Pinus, second because this species have greater ascospores (in mean) than those of D. confusa (which grows under Picea abies, sometimes also Larix decidua).
Enrique Rubio, 14-06-2021 12:20
Enrique Rubio
Re : Helvella 0256
Thank you, Nicolas.
In many cases the spores of D. leucomelaena have a certain parallelism in their lateral walls. Do you know if this is the same in D. confusa?
Nicolas VAN VOOREN, 14-06-2021 13:42
Nicolas VAN VOOREN
Re : Helvella 0256
No, I didn't see such spore shape in D. confusa where ascospores are widely ellipsoid, i.e. Qm ratio around 1.5-1.6 for my collections, vs. 1.7 for D. leucomelaena.
Sánchez Leandro, 14-06-2021 14:09
Sánchez Leandro
Re : Helvella 0256
Thank you very much, Nicolas !!!!!