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26-10-2020 09:58

Nicolas VAN VOOREN Nicolas VAN VOOREN

Hi.Here is the tiny white discomycete (~0.1 mm Ø)

25-10-2020 17:53

Guy Buddy

Good day,This fungus was fruiting abundantly from

26-10-2020 07:48

Blasco Rafael Blasco Rafael

Hola, esta muestra estaba sobre tallos de Angelica

25-10-2020 12:35

Juuso Äikäs

These were growing on a low branch of a deciduous

25-10-2020 18:32

Mirek Gryc

HelloSomeone help?Mirek

23-10-2020 21:50

Dirk Baert

Hello,I fund this Helicoon spec. on rot wood.anyon

24-10-2020 14:28

Castillo Joseba Castillo Joseba

De esta mañana recolectada  en acicullas de abet

23-10-2020 12:57

Marek Wolkowycki Marek Wolkowycki

Hello Bia?owie?a Primeval Forest on live shoots o

23-10-2020 12:02

Stephen Mifsud Stephen Mifsud

Hi, I found small white-cream colonies on decaying

23-10-2020 19:45

Angel Pintos Angel Pintos

Hello, anybody have:?Kohlmeyer, J. and Kohlmeyer,

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Orbilia ?dryadum
Chris Yeates, 20-09-2020 15:02
Chris Yeates
Bonjour tous

A few days ago I collected a piece of well rotted Quercus wood, which had several fungi on its damp underside. The portion retained was much smaller than shown in the first photo.

Species included were abundant growth of a Tomentella species with globose spinose spores, also Melanomma pulvis-pyrius, the anamorph of Chaetosphaeria pulviscula, and Orbilia leucostigma (as now understood).

There was, in addition, a different Orbilia species, which had small cylindrical spores and I was sure I had never seen it before. Reference to the monograph led me to Orbilia dryadum, my one doubt was the colour of the apothecia. Two apothecia were checked and, based on the identical spores were clearly the same species, but one had clavate to sub-capitate paraphyses, while the other had (mostly) more typical capitate ones. The spores measured 3.1-3.6 x 1.1-1.4 (1.6)µm - Qe=2.9. Annoyingly, I did not photograph some fusoid/ellipsoid spores (probably conidia) which were present in the slide preparation as I thought they were a contaminant! I should have known better and will make an attempt to find more, though the material is sparse.

As I say all this has led me to Orbilia dryadum - I would welcome advice.

Amitiés, Chris
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  • message #65070
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Hans-Otto Baral, 20-09-2020 16:47
Hans-Otto Baral
Re : Orbilia ?dryadum
Yes, this must be O. dryadum. The conidia you saw were septate? The apo colour is good I think, usually paler, though.
Chris Yeates, 20-09-2020 17:29
Chris Yeates
Re : Orbilia ?dryadum
As ever "vielen Dank" Zotto. This appears to be the 2nd UK / 1st English record; and I was only collecting in that area because I had time to kill before catching a train ;-)

My first success with the superb Monograph.

Chris

PS - yes the conidia were hyaline and septate