17-04-2025 18:31
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Nicolas VAN VOOREN
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17-04-2025 13:23
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15-04-2025 15:06
Francois Guay
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éric ROMERO
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Andreas Gminder
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Mathias Hass
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Hymenoscyphus caudatus?
Raúl Tena Lahoz,
30-09-2010 21:47
On Populus nigra rotten leaves, on August 22, 2010. I took no macrophoto. Apos clearly stipitate, stipe with a width of 0,2 mm, cup 0,5 to 0,8 mm in diameter, whitish over all. First I thought it could be Hymenoscyphus caudatus but paraphyses have pigmented VBs and maybe spores are smaller, so I´m not sure. Asci: probably euamyloid (not sure… because I did not test IKI thinking it was caudatus), no croziers. KOH + IKI: blue. 80-100 x 9-10 µm. Spores: one celled, some two celled when hypermature, 14-18 x 4-5,5 µm, with spore sheath, no cilia seen. Paraphyses with yellow VBs in the upper segment, not fusing. Pictures in the attached PDF.
This can be Hymenoscyphus caudatus?
Thanks in advance!
Raúl.
12975.pdf
Hans-Otto Baral,
30-09-2010 22:00
Re:Hymenoscyphus caudatus?
This is not easy to answer. In the current sense this is clearly H. caudatus. But when I scan through my photos, I see mostly smaller LBs in the spores. In a few finds I see such large LBs but the spores are here strongly scutuloid, i.e. basally acute, as in the one here:
My notes : Andechs, Goaslweide, 16.X.05, leaf of Quercus. Ap. whitish, stipe longer than disc diam. Asci without croziers, *110-122 x 11.7-12.5 µm. Sp. free *16-20 x (4.5-)5.4-5.7 µm, Ölm.5, large LBs 2-3 µm. Paraph. VBs 1(-2)refr.
You say the VBs were yellow. Did the disc also appear yelowish then?
Zotto
My notes : Andechs, Goaslweide, 16.X.05, leaf of Quercus. Ap. whitish, stipe longer than disc diam. Asci without croziers, *110-122 x 11.7-12.5 µm. Sp. free *16-20 x (4.5-)5.4-5.7 µm, Ölm.5, large LBs 2-3 µm. Paraph. VBs 1(-2)refr.
You say the VBs were yellow. Did the disc also appear yelowish then?
Zotto
Raúl Tena Lahoz,
30-09-2010 22:27
Re:Hymenoscyphus caudatus?
Thanks Zotto
Yes oil content is other thing that does not fit...
VBs are light yellow, but in the field I remember pure white apos. Maybe when drying they got more yellowish, sorry but I don´t remember, neither annotated that.
Spore shape seems different but this vary so much within the same apo sometimes...
I send you by mail the link with all the original photos so you can get more info.
Raúl.
Yes oil content is other thing that does not fit...
VBs are light yellow, but in the field I remember pure white apos. Maybe when drying they got more yellowish, sorry but I don´t remember, neither annotated that.
Spore shape seems different but this vary so much within the same apo sometimes...
I send you by mail the link with all the original photos so you can get more info.
Raúl.