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03-10-2017 14:53
Steffen LorenzHello, I found this Nectria species, which belong
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12-11-2021 17:34
![Robin Isaksson](/uploads/user_vgn/Isaksson-0001.jpeg)
Hi,Does anyone know this one or genus?found on soi
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11-11-2021 23:06
Nihad OmerovicHelloLooking for opinions on this Rutstroemia.Coll
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10-11-2021 22:54
![Edvin Johannesen](/uploads/user_vgn/Johannesen-0001.jpg)
Hei! Before I do further studies, just a quick Q:
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09-11-2021 15:06
![Zuzana Sochorová (Egertová)](/uploads/user_vgn/Egertova-0001.jpg)
Hello,I have here an ascomycete collected in Morav
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11-11-2021 10:43
Gonçalo MarquesHi! I'm new here and this is my first post :) I
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10-11-2021 17:33
![Riet van Oosten](/uploads/user_vgn/van-Oosten-0001.jpg)
Add-on topic http://www.ascofrance.com/forum/7059
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
![Norbert Heine](/uploads/user_vgn/Heine-0001.jpg)