27-10-2025 00:34
Francois Guay
I found this strange species in Québec,Canada, gr
27-10-2025 15:29
Michel Hairaud
Bonjour à tous, Avec Elisabeth Stöckli nous avo
26-10-2025 13:39
Joaquin MartinHi,I found this fungus in a mixed forest of spruce
26-10-2025 21:23
Juuso ÄikäsHello, a couple weeks ago I found some pale, whit
23-10-2025 20:59
Patrice TANCHAUDBonsoir, est-ce que quelqu'un posséderait un com
24-10-2025 14:50
Riet van Oosten
Hello, Found by Laurens van der Linde, Oct. 2025
Ceuthospora cf. mahoniae
Riet van Oosten,
09-03-2019 18:40
Hello,
Found by Laurens van der Linde, on Berberis vulgaris
Could this be Ceuthospora mahoniae?
The size of the conidia doesn't quite fit, 13.6-16.4 x 2.3-2.4 µm
This species in Microfungi on Land Plants, page 162, under Mahonia (Oregon Grape) = family Berberidaceae.
Ellis & Ellis: "Conidiomata multiocular, black, with a central pore. Conidia hyaline, 10-14 x 1.5-2. On dead leaves, Mar.-Apr."
Greetings, Riet
Chris Yeates,
09-03-2019 19:28
Re : Ceuthospora mahoniae
Hello Riet
There are many problems with these "Coelomycetes" and it is often not easy to assign every collection to a reliable name.
One problem is that in the past form-species occurring on different host genera or families were often considered to be different species, even if morphology was not very different. How many "good" Ceuthospora spp, there are is therefore uncertain. What is needed is molecular work to sort out the actual different taxa, and then hopefully morphological characters to differentiate them for field workers will emerge.
I'm attaching the relevant page from W.B. Grove's "Stem & Leaf Fungi"; he described Ceuthospora mahoniae and this will have been where Ellis and Ellis got those conidial measurements from. In my experience Grove's measurements are fairly reliable. I would record this as Ceuthospora cf. mahoniae Grove.
Hope that helps a little bit
Chris
Extracted-page-291-from-1935-Stem-amp-LeafFungi-v1-0001.pdf
Riet van Oosten,
09-03-2019 20:05
Re : Ceuthospora mahoniae
Hello Chris,
Thank you for your help and explanation!
Thank you for your help and explanation!
Chris Yeates,
11-03-2019 19:03
Re : Ceuthospora mahoniae
Here is the original description from Journal of Botany vol. 56 (1918):
Riet van Oosten,
11-03-2019 21:44
Re : Ceuthospora mahoniae
Very nice Chris, thank you!