14-05-2024 09:19
Hans-Otto BaralHi, I want to announce for next Sunday 17.00 middl
16-05-2024 11:19
Sylvie Le GoffBonjour, j'ai récolté sur une branchette de feui
16-05-2024 11:49
Castillo JosebaDe ayer en rama de abetoNo se por donde mirarA ver
16-05-2024 09:02
Vasileios KaounasFound 15-05-24 in forest with Abies cephalonica, i
29-01-2022 21:44
Jan EcksteinGood evening, apothecia small, yellowish, 150-300
16-05-2024 07:34
Vasileios KaounasFound in forest with Abies cephalonica. Diameter 0
15-05-2024 10:54
Viktorie HalasuHello, would anyone have this paper please? I did
14-05-2024 19:48
B Shelbourne• Hymenoscyphus: Habitat, macro, spores, paraphy
This species quite often met at dead twigs of dwarfshrubs (Chamaedaphne calyculata, but probably others as well), in bogs. I have only one collection, though. It was without clamps; this feature reported by Raitviir (2002, A revision of the genus Dasyscyphella?) "for all Eurasian collections", but "in American collections they originate from croziers" (var. uncinata Raitv.).
All characters fit well with description of D. cassandrae var. cassandrae, except spore septation. I see clear septa already inside the asci; but Raitviir described them aseptate.
I think, what i 've seen it is real septation? -and if so, it must be underdescribed character of this species?
Apothecia cupulate, stipitate, receptacle to 1 mm in diam, stipe to 1 mm high, all frb up to 1,5 mm; hymenium yellowish, outer sirface pure white; outer surface and stipe densely covered by hairs; edge with long hairs; growing scattered or by several nearby.
Excipulum from textura porrecta in stipe (hyphae near 4 mk broad), textura prismatica at flanks (cells ellipsoid, with thickened walls, 20-30 x 6-8; hairs cylindrical, up to 150 mk long, rough at base, smooth in upper part, 4-6 segmented, the base slightly broader (3) and tip slightly enlarged, the narrowest part under tip beeing near 2; asci clavate, tip obtuse-conical, sometimes with protruding pore site, without clamp, pore euamyloid, with 8 interwoven spores collected in upper part, 92,5 (80-116) x 10 (8-11); paraphyses cylindrical, scarsely branched, segmented, with vacuolar content (vital, water); 2 mk broad, not exceeding the asci; spores vermiform, curled in asci, without or with 3-5 septa (already inside asci), 52 (44-67) x 2,4 (2-2,6) (N=14) (real length some longer since measurements done in curved state).
Au sujet du cloisonnement des spores, lire la diagnose originale reproduite dans la revue Hedwigia 1899 (38) : 10
http://www.biodiversitylibrary.org/page/507326
"... deutlicht septirt, zuweilen auch dreizellig, ..."
Amitiés, Guy
DENNIS R.W.G. 1972 The type species of Dasyscyphella Tranzschel. [cassandrae, corticola]. Kew Bull. 27 2 273-274.
Si vous n'avez pas cet article, je peux faire une copie ce soir.
So, in the original description by Tranzscel spores "filiform, usually curved, sickle-shaped, in the middle clearly septate, sometimes 3-celled, hyaline". This matches my observations well (mine up to 5-celled). For some reason Raitviir has omitted this character in two his works on the genus (1970, 2002).?