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05-11-2025 11:33

Cladosporium ?
Pierre Repellin

Bonjpur,J'ai trouvé, sur une hampe florale d'Alli

04-11-2025 09:07

Hymenoscyphus on blueberry.
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Hello.A suspected Hymenoscyphus sprouting on a thi

04-11-2025 12:43

Protounguicularia transiens?
Edvin Johannesen Edvin Johannesen

Hi! One more found on old Populus tremula log in O

04-11-2025 14:53

Ophiobolus?
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Hello.Very small, globose, mucronate perithecia, b

03-11-2025 21:34

Tatraea sp. ? on Populus tremula
Edvin Johannesen Edvin Johannesen

These tiny (0.4-0.5 mm diam.), whitish, short-stip

03-11-2025 19:41

Ascomycetes
David Chapados David Chapados

Hi,Does anyone knows which genus could this be? G

28-10-2025 15:37

Bright orange stalked asco
Carl Farmer

I'd be grateful for any suggestions for this strik

03-11-2025 16:30

Hymenoscyphus phiala
Hans-Otto Baral Hans-Otto Baral

Hello I want to ask you if you have found this ye

01-11-2025 09:14

Telogalla olivieri
Francis Maggi

Bonjour,Trouvé sur Xanthoria parietina à Valdebl

28-10-2025 19:33

Rutstroemia firma
Nicolas Suberbielle Nicolas Suberbielle

Bonjour à tous,Je voudrais votre avis sur cette r

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Nectriella sp. on Impatiens
Björn Wergen, 24-05-2013 12:23
Björn WergenHi friends,

I have found another Nectriella, which is near N. dakotensis, but with verrucose, bigger spores and longer setae. It has very small 0,1 mm broad, orange yellow fruitbodies with a distinct whitish ostiolus and surrounding, redbrown setae. I have tried to find this out with Rossman's Family of Bionectriaceae, but stucked between N. alpina and N. halonata, which do not fit this finding.

Short description:
Sp. 11-16x2,5-4µm, slightly verrucose, 1septate. Asci 45-55x6-7µm. setae 60-90x5-6µm. On Impatiens glandulifera.

Any other ideas?

regards,
björn

edit: I think this IS N. halonata. Probably a small spored form?
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Christian Lechat, 24-05-2013 12:33
Christian Lechat
Re : Nectriella sp. on Impatiens
Hi, Björn,
did you test KOH and lactic acid?

Regards,
Christian
Björn Wergen, 24-05-2013 12:37
Björn Wergen
Re : Nectriella sp. on Impatiens
Hi Christian. What does KOH do? I will test it directly.
Björn Wergen, 24-05-2013 12:54
Björn Wergen
Re : Nectriella sp. on Impatiens
I have tested it, but there was no reaction either with KOH nor with lactic acid.
Christian Lechat, 24-05-2013 16:39
Christian Lechat
Re : Nectriella sp. on Impatiens
I think your fungus is not N. halonata, I saw this species, it is not like this. Could you show an image of the ascomatal wall in vertical section?

Christian
Björn Wergen, 24-05-2013 17:39
Björn Wergen
Re : Nectriella sp. on Impatiens
Hmmm the fruitbodies are very soft and impossible for me to cut. What can I do? Just drying?
Christian Lechat, 24-05-2013 18:42
Christian Lechat
Re : Nectriella sp. on Impatiens
you can send me your specimen (dried), I will study it gladly, because your collection is very interesting.

Regards,
Christian
Björn Wergen, 24-05-2013 19:04
Björn Wergen
Re : Nectriella sp. on Impatiens
Hi Christian,

of course I can send you the collection.

regards,
björn