12-04-2026 17:56
Hardware Tony
Found on dead stems in February earlier this year
17-04-2026 19:16
Enrique Rubio
Hi to everybodyI would appreciate any assistance r
14-04-2026 05:32
Ethan CrensonHi all, A few weeks back a friend pointed out som
17-04-2026 15:14
Bruno Coué
Bonjour.Récoltes du 16/04/2026, sur feuilles mort
12-04-2026 15:52
Gernot FriebesHi,I'm looking for help with this anamorph collect
14-04-2026 21:52
Gernot FriebesHi,found on dead leaves of Carex elata. Conidia: 4
16-04-2026 22:09
Buckwheat PeteHello, I'd like to ask about this older specimen:
15-04-2026 19:33
Fátima Durán ManzanequeHi!! I need help, I found this Ascomycete but I d
14-04-2026 20:31
Gernot FriebesHi,can this be Psilachnum lateritioalbum on Phragm
12-04-2026 12:22
William Slosse
In a dune grassland in Oostduinkerke (Belgium), on
I found this Nectria species, which belongs to the N. cinnabarina complex. The dark colour was remarkable for me. Analyzing the spores I found several of it with three septa. So I thought this was N. cinnabarina s. str. But after further search I also found two spores with four septa. According to the key of Hirooka, Rossman and Chaverri: "A morphological and phylogenetic revision of the Nectria cinnabarina species complex" this is Nectria nigrescens.
The name suggests a blackening behavior of the species. But this is not described for this species. The normal colours are brighter like in N. cinnabarina but all species, including N. dematiosa can be more or less darker. The dried sporodochia seem to be darker than the fresh ones. Some of them are black now.
Am I right with N. nigrescens? Are there new scientific findings? Is this a rare or overlooked species?
Sporodochia: short stipitate to sessile, dark red brown, seem to blacken when dried
Ascospores: 12-16 (19) x 4-5,5 µm, mostly 1, sometimes 0 or 2 septate, rarely 3 septate
Best regards
Steffen
can anybody confirm or refute Nectria nigrescens or suggest another species?
Regards
Steffen
