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Juuso ÄikäsLast Tuesday I found some tiny white Helotiales gr
Greenish asco on pine?
Mirek Gryc,
20-12-2025 15:47
These grew on pine wood that was heavily covered in algae, which likely explains their greenish tint. The asci showed a negative reaction to iodine (IKI-). Unfortunately, I was unable to observe any croziers. Spores (9.8) 11.1 - 12.7 (12.9) × (3.4) 3.7 - 3.9 (4.7) µm.
Other characteristics are shown in the attached photos. Is it possible to identify them further based on this information?
Best regards,
Mirek
Michel Hairaud,
20-12-2025 16:29
Re : Greenish asco on pine?
Bonjour Myrek ,
Did you consider an apothecia in Vezdaea ? (I am not sure but the septate spores as seen andsubstrate could match)
AMitiés. Michel
Did you consider an apothecia in Vezdaea ? (I am not sure but the septate spores as seen andsubstrate could match)
AMitiés. Michel
Hans-Otto Baral,
20-12-2025 17:20
Re : Greenish asco on pine?
I consider the genus Coenogonium (former Dimerella).
Zdenek Palice,
20-12-2025 17:41
Re : Greenish asco on pine?
Hallo,
agreement with Zotto,
Coenogonium pineti
omnipresent forest microlichen
hymenium should be amyloid
Zdenek
Mirek Gryc,
20-12-2025 17:49
Re : Greenish asco on pine?
Dear both,
Michel's suggestion had already prompted me to look in a different direction. The familiar appearance of the paraphyses tips reminded me of a species I have microscoped before, namely Coenogonium pineti. However, the fruitbodies of this species that I've encountered so far were larger. I cannot be entirely certain, but Zotto's suggestion reinforces my suspicion that this is indeed the species. The spore size is also a good match.
Lately, I've had a knack for finding ascomata whose small size exceeds the capabilities of my microscopy equipment.
Thank you both very much for your interest and help.
Best regards,
Mirek
Michel's suggestion had already prompted me to look in a different direction. The familiar appearance of the paraphyses tips reminded me of a species I have microscoped before, namely Coenogonium pineti. However, the fruitbodies of this species that I've encountered so far were larger. I cannot be entirely certain, but Zotto's suggestion reinforces my suspicion that this is indeed the species. The spore size is also a good match.
Lately, I've had a knack for finding ascomata whose small size exceeds the capabilities of my microscopy equipment.
Thank you both very much for your interest and help.
Best regards,
Mirek
Mirek Gryc,
20-12-2025 17:56
Re : Greenish asco on pine?
My thanks to Zdenek as well. Best regards!
Mirek
Mirek Gryc,
20-12-2025 18:03
Re : Greenish asco on pine?
A brief follow-up to Zdenek's comment:
Unfortunately, I did not observe a blue iodine reaction in the hymenium, which was somewhat misleading. However, I have read that this reaction can be very fleeting, so it is possible that I was too slow with my observation.
Thank you all once again.
Unfortunately, I did not observe a blue iodine reaction in the hymenium, which was somewhat misleading. However, I have read that this reaction can be very fleeting, so it is possible that I was too slow with my observation.
Thank you all once again.
Hans-Otto Baral,
20-12-2025 20:16
Re : Greenish asco on pine?
I think you will obtain a distinct blue reaction when you pretreat with KOH and add IKI after washing with water. The reaction of the outer ascus wall is hemiamyloid.