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14-07-2020 19:42

Pavol Palo

Hello friends, may I ask you for help ? I would n

14-07-2020 13:49

Thomas Læssøe

See: https://svampe.databasen.org/observations/10

14-07-2020 20:36

Andgelo Mombert Andgelo Mombert

Bonsoir, Sur aubépine (Crataegus) morte. Ascos

14-07-2020 06:57

Stoykov Dimitar Stoykov Dimitar

Dear friends,I am looking for Cannon, P.F.  1999.

14-07-2020 19:46

Andgelo Mombert Andgelo Mombert

Bonsoir, Sur une grosse tige morte de Rosa sp. A

14-07-2020 12:27

Juuso Äikäs

These Orbilias I found growing on a fallen, decort

14-07-2020 09:23

Thomas Læssøe

See: https://svampe.databasen.org/observations/10

14-07-2020 16:12

Benko Gabor Benko Gabor

Dear Group! Please help me with this asco. I found

13-07-2020 12:06

Garcia Susana

Hola, Me gustaría saber vuestra opinión acerca

13-07-2020 12:08

Juuso Äikäs

Yesterday I found some Pulvinulas growing on clay-

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Orbilia rose
Camille Mertens, 24-05-2020 11:31
Bonjour à tous.


Sur branche (alnus?), en bordure d'un petit ruisseau et en compagnie de Hymenoscyphus kathiae.

Diamètre : max 1mm

Spores : 6,6 - 8,7 x 1,25 - 1,4 µm

Difficile de trancher entre plusieurs espèces proches l'une de l'autre.

Merci de votre aide.

Camille
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Hans-Otto Baral, 24-05-2020 11:49
Hans-Otto Baral
Re : Orbilia rose
Should be Orbilia rosea indeed :-)

No joke. O. sarraziniana is similar but differs in the upper spores inverted in the ascus (SBs downwards).
Camille Mertens, 24-05-2020 12:03
Re : Orbilia rose
Vielen Dank Zotto
Camille Mertens, 25-05-2020 10:31
Re : Orbilia rose
Hi Zotto.

Looking again under the microscope I found this.
Could it be the helicoon conidia stage?
Regards.
Camille
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Hans-Otto Baral, 25-05-2020 11:03
Hans-Otto Baral
Re : Orbilia rose
No, these are coloured conidia of a different shape.
Lothar Krieglsteiner, 25-05-2020 18:03
Lothar Krieglsteiner
Re : Orbilia rose
Hello Zotto,
is rosea another Name for luteorubella? In my Memory sarraziniana and luteorubella were the two species separated mainly by spore orientation in the Ascus.
I never heard of rosea.
Best regards, Lothar
Hans-Otto Baral, 25-05-2020 20:46
Hans-Otto Baral
Re : Orbilia rose
Hi Lothar

you need to wait for the 2nd part of the monograph :-)

Section Helicoon will be there on top.

O. rosea is very similar to O. luteorubella but has anguillospora-like conidia in contrast to O. luteorubella with Helicoon. So without the conidia it is difficult. Our idea was that pure rose apothecia more probably belong to O. rosea. Genetically they are very different. And O. rosea goes up the mountains and prefers running water, whereas helicoon-like conidia are adapted to standing water bodies.

Zotto
Juuso Äikäs, 25-05-2020 23:30
Re : Orbilia rose
I wonder what is the best way to find the conidia from a sample. Is there a particular technique for it or does it just sometimes show up in a microscope view? I think I read somewhere that with some species it is present only in a culture. I've still got a last year's sample that I posted here that was O. rosea or luteorubella and was thinking that maybe it's possible to find the conidia and arrive at a more accurate conclusion...
Hans-Otto Baral, 26-05-2020 06:35
Hans-Otto Baral
Re : Orbilia rose
This is very difficult. In this group of semi-aquatic species you will very rarely see them on the substrate. In culture it is more probable though not easy to trigger their formation. The "easiest" way is a sequence.