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14-04-2026 21:52

Thyriothecioid anamorph on Carex elata
Gernot Friebes

Hi,found on dead leaves of Carex elata. Conidia: 4

14-04-2026 20:31

Psilachnum lateritioalbum on Phragmites australis?
Gernot Friebes

Hi,can this be Psilachnum lateritioalbum on Phragm

14-04-2026 05:32

Pyrenomycete with yellow subiculum on Aralia
Ethan Crenson

Hi all, A few weeks back a friend pointed out som

12-04-2026 17:56

Seeking genus for 1 – 3 septate spored asco. on herb Nepteta cataria (Mint).
Hardware Tony Hardware Tony

Found on dead stems in February earlier this year

12-04-2026 15:52

Anamorph on Salix
Gernot Friebes

Hi,I'm looking for help with this anamorph collect

12-04-2026 12:22

Unknown anamorph on Primula eliator
William Slosse William Slosse

In a dune grassland in Oostduinkerke (Belgium), on

11-04-2026 15:45

Article search - Octospora ithacaensis
Zuzana Sochorová (Egertová) Zuzana Sochorová (Egertová)

Please, could anyone send me this paper?Moyne G.,

11-04-2026 13:34

Requesting help with Dasyscyphella sp. ID
Artem Ptukha

Hello, I am seeking assistance with the identific

11-04-2026 10:42

Una para ID
Castillo Joseba Castillo Joseba

Me mandan el material de Galicia, España, recolec

11-04-2026 10:19

Bientôt, un nouveau livre important
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Chers amis d'Ascofrance , voici une très bonne no

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Pyrenomycete on Rhododendron
Stefan Blaser, 05-08-2013 10:41
Hello everyone

I could need help with this pyrenomycete on deciduous wood (Collector says Rhododendron ferrugineum).


Description: Perithecia immersed in the bark, with ostioles just visible as small dots breaking through the surface. Perithecia globose to slightly flattened, around 0.2 mm in diameter with a cylindrical to rounded ostiolar neck of usually 80-150 µm in height. Asci 70-85 x 16-18 µm, with apikal apparatus well visible in Kongo (see photo), 8-spored. Paraphyses not observed. Spores 12-15 x 5.5-6 µm, ellipsoid, hyaline, thin-walled, one-celled, without oildrops.


Thanks a lot for any suggestions


Stefan

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Yannick Mourgues, 05-08-2013 12:43
Yannick Mourgues
Re : Pyrenomycete on Rhododendron
It seems to be Botryosphaeria genus. Something around B. vaccinii ...

You should find something here : http://www.cybertruffle.org.uk/cyberliber/59350/0062/002/0378.htm

Yannick

EDIT:
You should check if there is a gelatinous cap around spores in Indian Ink and see if ascus are bitunicate or not (it seems to be unitunicate on your photos, and if it is, it can't be B. vaccinii).
Stefan Blaser, 05-08-2013 14:32
Re : Pyrenomycete on Rhododendron
Hi Yannick

Thanks a lot for the Input and Literature link. I just checked in Indian ink and did not observe a gelatinous sheath. I would clearly tell the Asci to be unitunicate.

I will take a closer look at the M.E. Barr Article

Stefan
Paul LEROY, 05-08-2013 19:39
Re : Pyrenomycete on Rhododendron
Hello Stefan,
Ce spcimen est à chercher dans les Diaporthales et probablement
dans le genre Sphaerognomonia.
Amicalement
Paul LEROY
Stefan Blaser, 06-08-2013 08:25
Re : Pyrenomycete on Rhododendron
Hello Paul

Merci bien. J'ai aussi arrivé au Gnomoniacées lorsque j'essaye d'identifier moi-meme. Je vais regarder le genre Sphaerognomonia.

Stefan