21-11-2025 11:52
Jean-Luc RangerBonjour à tous, on voit toujours 2 espèces areni
21-11-2025 10:56
Christopher Engelhardt
Very small (~0,5 mm) white ascos, found yesterday
14-11-2025 16:26
Marian Jagers
Hello everyone, On dead wood of Cytisus scoparius
17-11-2025 21:46
Philippe PELLICIERBonjour,Récolté sur bois pourrissant de feuillu
20-11-2025 14:14
Mick PeerdemanFound on the leaves of 'Juglans regia' in the Neth
20-11-2025 13:07
Mick PeerdemanIn January i found these black markings on the dea
Nectriaceae on bark of Banksia
Hans-Otto Baral,
23-10-2007 18:35
Bon soir,on a dry branch of Banksia grandis in SW-Australia grows on the bark (peridermis) among the hairy felt a nice Nectriaceae which was at first sight taken for an Orbilia. It is characterized by rather large spores. The orange peridium turns deep pink in KOH and does not seem to have a perceptible ostiole. Any idea? I have not tried any key.
Sp. *29-31 x 9.5-10.3 µm, smooth, hyaline. Many spores still alive 13 months after collection.
There is also a polysporous Nitschkia (?broomeana) on this branch.
Zotto
Hans-Otto Baral,
23-10-2007 18:36
Re:Nectriaceae on bark of Banksia
here are the living spores
Hans-Otto Baral,
23-10-2007 18:37
Re:Nectriaceae on bark of Banksia
and the peridium in KOH (yellowish-orange in water)
Hans-Otto Baral,
23-10-2007 18:37
Re:Nectriaceae on bark of Banksia
again
NC NC,
23-10-2007 19:04
Re:Nectriaceae on bark of Banksia
Why not send this information to Amy Rossman or Gary Samuels?
Dick
Dick
Christian Lechat,
23-10-2007 19:41
Re:Nectriaceae on bark of Banksia
Hi Zotto,
is there a stroma? which is the thickness of the perithecial wall? cupulate ascomata when dry?
could you make an image of vertical section of ostiolar region? :)
is there a stroma? which is the thickness of the perithecial wall? cupulate ascomata when dry?
could you make an image of vertical section of ostiolar region? :)
Hans-Otto Baral,
24-10-2007 16:50
Re:Nectriaceae on bark of Banksia
Hi Christian
The perithecia are actually rather strongly collapsing when dry. The spores have a wider range: *(26-)29-31(-35) x 9.5-10.3(-11.3) µm, and shrink considerably in KOH: (25-)28-33.5 x 8.2-9 µm. The The peridial wall is laterally upto 30 µm thick. I did not succeed, however, to hit the ostiolum, the perithecium is apparently brittle when dry. Also it is completely immersed among the dense hair felt on the bark.
The perithecia are actually rather strongly collapsing when dry. The spores have a wider range: *(26-)29-31(-35) x 9.5-10.3(-11.3) µm, and shrink considerably in KOH: (25-)28-33.5 x 8.2-9 µm. The The peridial wall is laterally upto 30 µm thick. I did not succeed, however, to hit the ostiolum, the perithecium is apparently brittle when dry. Also it is completely immersed among the dense hair felt on the bark.
Hans-Otto Baral,
24-10-2007 16:52
Re:Nectriaceae on bark of Banksia
The anchoring hyphae are 3-5 µm wide, +/- thick-walled.
If you wish I will send it to you (together with H. arenula).
Of course I would be glad to have a statement by Amy Rossman and Gary Samuels. They do not appear to visit Ascofrance?
Zotto
If you wish I will send it to you (together with H. arenula).
Of course I would be glad to have a statement by Amy Rossman and Gary Samuels. They do not appear to visit Ascofrance?
Zotto
Christian Lechat,
24-10-2007 21:20
Re:Nectriaceae on bark of Banksia
Dear Zotto,
according to your data, I think it is a Cosmospora but without to see it, it is difficult to say something
You can send it to me, I will be glad to see it because I don't find any species like this in Cosmospora genus.
Regards
according to your data, I think it is a Cosmospora but without to see it, it is difficult to say something
You can send it to me, I will be glad to see it because I don't find any species like this in Cosmospora genus.
Regards