17-09-2025 10:50
Heather MerryleesHi there!I am hoping for any advice on the identif
11-09-2025 16:57
Jason Karakehian
Our revision of Marthamycetales (Leotiomycetes) is
16-09-2025 12:53
Philippe PELLICIERPézizes de 1-4 mm, brun grisâtres, sur les capsu
03-09-2025 12:44
Enrique Rubio
Hi to somebody.I would like to know your opinion o
15-09-2025 14:40
Nicolas VAN VOOREN
Hello.I'm searching for a digital copy of the seco
14-09-2025 22:16
Philippe PELLICIERApothécies petites jusquà 3 mm, oranges, avec de
13-09-2025 14:01
Thomas Flammerdark brown apothecia, splitIKI-Spores biguttulate
10-09-2025 17:18
Blasco Rafael
Hola, encontre este estiercol de vaca estos apotec
13-09-2025 14:10
Wim de GrootWe found this hymenoscyphus on rubus fruticulosis.
10-09-2025 23:53
Marcel Heyligen
Found on Robinia pseudoacasia together with Diapor
Lasiobelonium or Trichopezizella (?) on Populus
Edvin Johannesen,
23-11-2020 17:16
This very small (ca. 1 mm when disck is open), beautiful hyaloscyphaceous discomycete was growing on Populus tremula wood (underside of log). The hairs look very dark, but they are rather pale towards their tips. Hairs originate from dark brown, bulbous cells derived from brown, septate, somewhat sinuous hyphae in the excipulum. The hairs abruptly turn pale/almost hyaline and are septate, appearing rough on the surface and somewhat pointed (I am assuming these are the hairs towards the rim).
Ascus apparatus is hemi-amyloid (browninsh with Lugol, no pre-treatment). I think croziers are present (see photo). Paraphyses appear to be variable, from cylindrical and smooth to lanceolate and roughened. Spores 9-11 x 2-3 mcr, ellipsoid, somewhat pointed, becoming 1-septate, it seems.
I cannot recall heving seen this type of hairs in Lasiobelonium. And does any Trichopezizella species occur on wood?
Apprcieate you opinion here. Thanks.
Edvin Johannesen,
23-11-2020 17:18
Re : Lasiobelonium or Trichopezizella (?) on Populus
Hairs, subhymenium, excipulum.
Edvin Johannesen,
23-11-2020 17:19
Re : Lasiobelonium or Trichopezizella (?) on Populus
Ascus tips.
Hans-Otto Baral,
23-11-2020 17:50
Re : Lasiobelonium or Trichopezizella (?) on Populus
Wonderful! Look in my folder Trichopeziza with brown lumps, and there atroviolacea.
Your hair photos were made in Congo? KOH? The lumps dissolve I remember.
I would be very glad to include your sample in my coming paper, but would need the collection data. Also ecological remarks would be welcome. Was it near a watercourse? A shady place? Whic trees around? Acidic?
Edvin Johannesen,
23-11-2020 17:56
Re : Lasiobelonium or Trichopezizella (?) on Populus
Indeed wonderful! I did not use Congo Red - think it was in water, possibly KOH, but will check again.
I will check your folder and provide further data on the collection. In the meantime - thanks for always being helpful!
Edvin Johannesen,
23-11-2020 18:24
Re : Lasiobelonium or Trichopezizella (?) on Populus
A few more photos of the hairs and basal cells, in water. The pale parts of the hairs have some colourless lumps, but I do not see lumps on the brown parts, like in the collection from June: http://www.ascofrance.fr/forum/63911/dark-haired-stipitate-hyaloscyphaceae
These apothecia are sessile, unlike the prvious one. But they are still the same?
Hans-Otto Baral,
23-11-2020 20:52
Re : Lasiobelonium or Trichopezizella (?) on Populus
Ah, I forgot these stipitate were yours. Such a long stalk I never saw, so it seems you find the extrems :-)
If you see any microscopic difference, please tell me. But: The paraphyses of this species are warted. Is this the case in your new one? I did not see clearly. Your phase contrast is a bit unfortunate regarding cell contents, but warts on paraphyses it should show well.
Edvin Johannesen,
24-11-2020 12:44
Re : Lasiobelonium or Trichopezizella (?) on Populus
I see blunt warts of variable size on many of the lanceolate paraphyses. They appear to detach to some degree and float around in the medium after squashing. Do you agree that these photos show the warts?
Edvin Johannesen,
24-11-2020 12:45
Re : Lasiobelonium or Trichopezizella (?) on Populus
I have sent you an email with the collection data, Zotto.
Hans-Otto Baral,
24-11-2020 16:54
Re : Lasiobelonium or Trichopezizella (?) on Populus
Thanks! Yes, not the big drops but the rough surface is visible for some paraphyses.