25-03-2026 15:06
Bernard CLESSE
Bonjour à toutes et tous,Pourriez-vous me confirm
25-03-2026 13:54
Enrique Rubio
Does anyone know where I could download Paoletti's
25-03-2026 10:35
Hulda Caroline HolteHello,I collected this species growing on a dead b
24-03-2026 19:59
William Slosse
Hello everyone,On 23/03/26, I found the following
21-03-2026 15:13
Lepista ZacariasHello everyone, Does any one know of any literatu
24-03-2026 21:37
Elisabeth StöckliBonsoir,Sur bois (tronc) très pourri de conifère
24-03-2026 21:07
Ethan CrensonHello all, A friend collected this asco in a wood
23-03-2026 20:16
Miguel Ángel Ribes
Good eveningI'm unable to identify this Coprotus o
24-03-2026 15:44
Åge OterhalsI hope someone can confirm the name of this collec
Found on a fallen branch of oak. The wood is colored black and the stromata has a stipe of 8x1 mm and a fertile part of 11x2.5 mm. The outer crust is hard and black with grey patches and lumpy as a result of the underlying perithecia.
TELEMORPHE:
Perithecia: subglobose 514 x 400 µm
Asci: cylindrical 124-158 x 8-9,65 µm
Paraphyses: filiform
Spores: 11,35-13,37 x 5,14-5,94 µm Q= 2.23 with straight germsplit (spore lenght 11.2 µm with germsplit length 7.85 µm)
ANAMORPHE: flat length 5-8 mm; conidia:10,41-16,3 x 3,02-3,86 µm
Macroscopic/microscopic this frb looks like Xylaria arbusula except the length of the asci is wrong and I found it in Belgium/Turnhout in winter! Is this not a tropical asco?
I will be grateful for your help!
Greetings,
François Bartholomeeusen
your images do not allow an identification.
Before considering X. arbuscula you should rule out X. hypoxylon. The key feature distinguish them is the thickness and texture of the outer crust. See my notes in the monographic keys available on Ascofrance.
Good luck,
Jacques
I have made the wrong choice at step 2 of your superb key. I chose "Stromata hard-textured with a carbonaceous outer crust".
Perhaps the persistent, drying east wind, the sun and the freezing temperature changed the texture a bit? In all cases reading your notes has shed light on my problems. I have also measured the out crust and is was about 40-45 µm thick.
Thank you for your quick reaction!
Cordial greetings,
François