08-11-2025 00:29
Francois Guay
I found this species in Quebec, Canada, on herbace
04-11-2025 09:07
Josep Torres
Hello.A suspected Hymenoscyphus sprouting on a thi
04-11-2025 12:43
Edvin Johannesen
Hi! One more found on old Populus tremula log in O
03-11-2025 21:34
Edvin Johannesen
These tiny (0.4-0.5 mm diam.), whitish, short-stip
Bonsoir à tousThis was collected on dead stems of Galium aparine. Apothecia without obvious margin, sessile, orange-pink. R.W.G. Dennis described a Calloria galiorum and I suspected I might have found that - the description (published in Kew Bulletin 45 (2)page 293) is repeated here but appears to refer to a different fungus:
"Calloria galiorum Dennis spec. nov. Apotheceis sparsis, superficialibus, sessilis, concavis, 350 pm latis, roseis; ascis subsessilis, 33-42 x 6-6.5 pm, octosporis, I + ; ascosporis continuis, hyalinis, 7-9 x 1.5-2.5 pm; paraphysibus filiformibus. In caulibus siccis Galii aparines. Skye, . . . . . In C. galii (Fuck.) Sacc. v. Höhnel (1918) found larger iodine negative asci 50-55 pm long."
this seemed to be close to this fungus; however the asci measure 50-59 x 7.2-7.9µm, and the ascospores measure 14.3-14.8 x 4-4.3µm (those shown are living, in water); the ascus measurements are closer to Calloria galii but that is described as with "sporidiis, oblongo-ovatis, didymis, medio vix constrictis . . . 14-7" (Saccardo, P.A. Sylloge Fungorum VIII: p. 640); so that does not fit either . . .
I cannot believe that others have not come across this discomycete on a very common host. Does anyone know of something like this please?
Chris
this is a hard nut. I am not sure whether this is a host-specific fungus. What I have in mind is the little-known genus Aivenia. At least it should be somthing of the Naevioideae.
I wonder whether you have any living asci and paraphyses there, especially the contents of the latter wouöld help me much.
Stip Helleman made a fine drawing of something similar, but on Glyceria. here attached. Apothecia were white.
Zotto
