27-02-2026 11:21
Yannick Mourgues
Hi to all. Here is a specie that can may be relat
18-03-2026 13:09
Khomenko Igor
I recently examined Celtis occidentalis branches
18-03-2026 18:42
Gonzalez Garcia MartaI have collected some lyre-shaped apothecia on the
18-03-2026 17:22
Katarina PastircakovaHi there,I'm looking for the following literature:
27-11-2025 15:41
Thomas LæssøeSpores brownish, typically 4-celled; 26.8 x 2.4;
18-03-2026 11:52
Thomas Læssøehttps://svampe.databasen.org/observations/10493688
11-03-2026 17:36
Michel Hairaud
Bonjour, Je cherche des indices pour cette réc
17-03-2026 10:40
Martine Vandeplanque
Bonjour à tous.Chaque année en mars ou avril, il
17-03-2026 19:41
Bernard CLESSE
Bonsoir à toutes et tous,Pourriez-vous m'aider à
12-03-2026 19:44
Enrique Rubio
Hi to everybody.Can you give me any suggestions ab
What is this pyrenomycete causing white lesions in hardwood bark?
Ethan Crenson,
05-05-2021 22:25
Hello all,
In a New York City cemetery last weekend I found a small hardwood branch with the bark beginning to fall away. In the bark are stout black pyrenomycetes in clusters, which seem to be causing white lesions in the bark and wood beneath. The pyrenomycetes can be quite large (by pyrenomycete standards). In the images of the 3 sectioned perithecia, the large one is 1mm wide by 1.5mm tall. It is 2mm tall when measuring from the base to the tip of the neck.
Asci: 153-168 x 7.5-10µm. The spore bearing part 105-125µm. IKI+, the apical plug about 2.5 tall x 3µm wide when mature; much longer in immature asci.
Spores: 13-14 x 6-7µm, brown, ellipsoid to inequalateral ellipsoid, guttulate, usually with one large guttule at the center, with a very inconspicuous germ slit less than spore length.
Can anyone help me put a name on this?
Thanks in advance.
Ethan
