21-05-2026 17:01
Pierre RepellinBonjour à toutes et à tous,Je recherche l'articl
20-05-2026 21:49
Margot en Geert VullingsWe found this Lachnum on Juncus stems mown last ye
20-05-2026 20:08
Andreas Millinger
Good evening,another quite distinctive find from M
20-05-2026 12:57
Ingo Ibelshäuser
Hello everybody, on decayed hardwood e.g. Quercus
20-05-2026 17:47
Margot en Geert VullingsWe found this Mollisia on dead Juncus stems mown l
22-04-2026 20:54
Enrique Rubio
Hi to everybody.This Pyrenopeziza grew in moist le
19-05-2026 12:55
Hardware Tony
After checking Gminder and Otto's library I cannot
Hi,Collected in October 1992 on decaying petioles of Petasites hybridus:
Perithecia superficial, gregarious, subglobose, flattened upper part, 0.3-0.4(0.5) mm diam., indistinct papillate, yellow-orange, with a crown of spreading, hyaline hairs.
Asci 8-spored, 73-83x9-10 µm.
Spores narrowly ellipsoid, 18-23(25)x5.5-7 µm, 1-septate, filled with 1-2 µm diam. guttules, smooth, hyaline.
Perithecial wall of textura angularis. Processes tapering, up to 115x13 µm, composed of agglutinated 2 µm diam. hyphae, hyaline.
Only a drawing available. Any idea? Thanks in advance.
Description of ascomatal wall, colour of perithecia in KOH as well as in lactic acid are required.
If there is no changing colour, you have choice among four genera:
Lasionectria, Lasionectriella, Ijuhya and Hydropisphaera, which are separated by characteristics of the cells composing the wall.
Did you see some orange, oily droplets in ascomatal wall or in hymenium?
Good luck
Christian