27-11-2025 15:41
Thomas LæssøeSpores brownish, typically 4-celled; 26.8 x 2.4;
27-11-2025 12:01
Thomas Læssøehttps://svampe.databasen.org/observations/10496727
27-11-2025 11:46
Thomas Læssøehttps://svampe.databasen.org/observations/10493918
27-11-2025 11:31
Thomas LæssøeCollectors notes: Immersed ascomata, erumpent thro
23-09-2025 13:31
Thomas Læssøehttps://svampe.databasen.org/observations/10534623
25-11-2025 14:24
Thomas Læssøehttps://svampe.databasen.org/observations/10490522
26-11-2025 18:13
Jason Karakehian
The entire run of Mycotaxon is now available throu
25-11-2025 11:03
Mick PeerdemanHi all,One of my earliest microscopy attempts, so
Nectria? on leaves
Marja Pennanen,
02-09-2014 10:10
these Nectria like fungi grow on leaves and their stems. The photo is from Sorbus aucuparia, buy they grow on propably Salix (or Malus), too.
They are about 0,2 mm wide.
The spores are two celled, about 16-19x4-5 and asci are about 70-90x10-12.
I really need a better key for Nectria like fungi, because it has been impossible to determine these lately. Does someone know, where to look for one?
Marja
Jacques Fournier,
02-09-2014 11:00
Re : Nectria? on leaves
Dear Marja,
the only advice I can give you and others is to start with the masterful paper about genera: Rossman et al 1999, Genera of Bionectriaceae, Hypocreaceae and Nectriaceae (Hypocreales, Ascomycetes), 1999, Studies in Mycology 42. 1-248. Maybe someone on the forum has it as a pdf, unfortunately I don't.
There you will learn about the importance of the reaction of the ascomatal wall in KOH and lactic acid, the structure of the wall, the presence of hairs, stroma, the anamorphs and features of cultures before suggesting a genus, let alone a species.
If you skip that step it will be difficult to make any progres with these fascinating fungi.
I wish you good luck!
Jacques
the only advice I can give you and others is to start with the masterful paper about genera: Rossman et al 1999, Genera of Bionectriaceae, Hypocreaceae and Nectriaceae (Hypocreales, Ascomycetes), 1999, Studies in Mycology 42. 1-248. Maybe someone on the forum has it as a pdf, unfortunately I don't.
There you will learn about the importance of the reaction of the ascomatal wall in KOH and lactic acid, the structure of the wall, the presence of hairs, stroma, the anamorphs and features of cultures before suggesting a genus, let alone a species.
If you skip that step it will be difficult to make any progres with these fascinating fungi.
I wish you good luck!
Jacques
Christian Lechat,
02-09-2014 17:32
Re : Nectria? on leaves
Hi Marja,
Here are some pages from Rossman 1999.
Cheers,
Christian
Here are some pages from Rossman 1999.
Cheers,
Christian
Rossman-1999-0001.pdf
Alain GARDIENNET,
03-09-2014 22:04
Re : Nectria? on leaves
Hi friends,
It's always online, on SIM website : http://www.cbs.knaw.nl/publications/Sim42/content/contents.htm
Here, could it be an Hydropisphaera Christian ?
Alain
Marja Pennanen,
04-09-2014 08:58
Re : Nectria? on leaves
Hi Jacques, Christian, Alain,
thank you for these information. I try to study them, when time allows.
So can this be a Hydropisphaera, I do not know yet ;)
Marja
thank you for these information. I try to study them, when time allows.
So can this be a Hydropisphaera, I do not know yet ;)
Marja
Christian Lechat,
04-09-2014 17:42
Re : Nectria? on leaves
Hydropisphaera is not impossible, il would be necessary to see a vertical section through ascomatal wall and an image of dried ascomata.
Marja,
if you want you can send me your collection.
All my best
Christian
Marja,
if you want you can send me your collection.
All my best
Christian
Marja Pennanen,
04-09-2014 23:43
Re : Nectria? on leaves
Dear Christian,
you know pretty well, that my surgery skills with my poor equipment are not the best possible ;)
So you will get post from me.
Marja
you know pretty well, that my surgery skills with my poor equipment are not the best possible ;)
So you will get post from me.
Marja