23-09-2025 13:31
Thomas Læssøehttps://svampe.databasen.org/observations/10534623
15-10-2025 16:39
Edvin Johannesen
These tiny (0.2-0.6 mm), white, pulvinate apotheci
03-10-2025 13:44
Riet van Oosten
Hello, Found by Laurens van der Linde on Populus
13-10-2025 19:05
Louis DENYBonjour forumSur tronc décortiqué de feuillu x,
11-10-2025 20:27
Marcel Heyligen
Found on a barked branch, 14 mm in diameter, of Ro
09-10-2025 22:14
S. RebeccaWe just had the Bavarian Mycology Conference in Au
10-10-2025 00:49
Ethan CrensonHello all, This was found last weekend on a hardw
Rose-coloured pyrenos on Cirsium
Juuso Äikäs,
08-08-2023 14:07
The asci are 8-spored and IKI negative. The spores are mostly 2-celled and measure 13.6 - 20.4 × 4.1 - 4.8 µm.
Maybe this is something in Nectriaceae, or something close to that?
Andgelo Mombert,
08-08-2023 15:06
Re : Rose-coloured pyrenos on Cirsium
Bonjour,
Je pense qu'il s'agit d'un Hydropisphaera. Il y a une clé de Lechat et Fournier dans la revue Ascomycete.org.
Dans le bleu coton, les spores sont ornementées ?
Je pense qu'il s'agit d'un Hydropisphaera. Il y a une clé de Lechat et Fournier dans la revue Ascomycete.org.
Dans le bleu coton, les spores sont ornementées ?
Juuso Äikäs,
08-08-2023 17:36
Re : Rose-coloured pyrenos on Cirsium
Thanks for the reply. I found the paper, and the closest fit might be H. cirsii. The name sounds promising, and the substrate of my collection might very well be Cirsium arvense, like mentioned in the paper.
However, that species should have hairs, and the spores should be finely spinulose (although they did look rather smooth in the pic). My collection seems to have smooth spores in CB (I can't rule out some very fine ornamentation). The spore shape and measurements would be fairly close, as would the size and color of the perithecia.
Maybe I'll name this just Hydropisphaera sp.
However, that species should have hairs, and the spores should be finely spinulose (although they did look rather smooth in the pic). My collection seems to have smooth spores in CB (I can't rule out some very fine ornamentation). The spore shape and measurements would be fairly close, as would the size and color of the perithecia.
Maybe I'll name this just Hydropisphaera sp.
Nick Aplin,
19-08-2023 21:18
Re : Rose-coloured pyrenos on Cirsium
Sorry for the late comment - Might it also be worth comparing this collection to Nectriella dacrymycella?
Regards,
Nick
Regards,
Nick