Accès membres

Mot de passe perdu?

30-06-2025 12:09

Black erumpent on Populus (Ascodichaenaceae?)

Edvin Johannesen

Edvin Johannesen

This tiny, rather "rough" erumpent asco was found

30-06-2025 16:56

Septoria on Impatiens glandulifera

Lydia Koelmans

Please can anyone tell me the species name of the

30-06-2025 14:45

is this a Hymenoscyphus on Nothofagus?

GÃ¶tz Palfner

Götz Palfner

This is a quite common species on Nothofagus wood

30-06-2025 06:57

Pezizales --Pyronema?

Ethan Crenson

Hi all, Another find by a friend yesterday in Bro

30-06-2025 19:05

RECHERCHE ARTICLE

ALAIN BOUVIER

Bonjour à toutes et à tousJe cherche à lire l'a

25-06-2025 16:56

Scutellinia cejpii ?

Philippe PELLICIER

Bonjour, pensez-vous que S. ceijpii soit le nom co

29-06-2025 18:11

unknown discomycete from Brooklyn

Ethan Crenson

Hello all, A friend found this disco yesterday in

28-06-2025 17:10

Literature Request

Peter Welt

Peter Welt

I'm looking for: RANALLI, M.E., GAMUNDÍ, I.J. 19

28-06-2025 16:00

Salvia leaf parasite

Josep Torres

Josep Torres

Hello.A tiny fungus shaped like globose black grai

27-06-2025 14:09

Pyrenomycetous fungi on old stalks of Chamaenerion

Åge Oterhals

I found this pyrenomycetous fungi in mountain area

Am I right or totally wrong with Ascobolus geophilus?

Maria Plekkenpol, 14-09-2019 21:53

Holland, 07-09-2019. In riverclay area on soil (old piece of riverbank). Apothecium yellowish/greenish, darkening into brown when older, largest 2,5-3 mm. Asci clavate, 155-190 x 18-20, no Meltzer reaction (J-).
Spores mature deep purple, young hyaline. I think I saw very fine granulation in the young spores, as well as fine warts. Mature spores with fissures/reticulated, 19-21 x 10-13.
Paraphyses slender, longer than the asci, yellow(ish). Septated, sometimes forked, with a slightly swollen top (not all of them).
Following van Brummelen I came to Ascobolus geophilus, but maybe I'm very wrong :)

What is your opinion? Thanks in advance!

Michel Delpont, 15-09-2019 09:08

Michel Delpont

Re : Am I right or totally wrong with Ascobolus geophilus?

Hello Maria.

Interesting! It is sometimes difficult to separate certain species of this genus. Compares with A.behnitziensis near geophilus. According to Dissing, geophilus spores are later adorned ornamented, unlike behnitziensis. Also try to make other preparations in the Melzer showing the asci; you say negative Melzer whereas normally the reaction must be positive.

Michel.

Viktorie Halasu, 15-09-2019 09:29

Viktorie Halasu

Re : Am I right or totally wrong with Ascobolus geophilus?

Hello Maria,
van Brummelen states that only very young asci are amyloid in A. behnitziensis - i.e., the blueing might be visible only in lower part of the hymenium, see here: https://www.nahuby.sk/obrazok_detail.php?obrazok_id=606132
Cheers,
Viktorie

Maria Plekkenpol, 15-09-2019 10:09

Re : Am I right or totally wrong with Ascobolus geophilus?

Thank you both very much for your quick reply! Sadly I only found two little fruitbodies and the material I tried to save has turned bad. What I can say is that the material I examined did have mature but also very young asci and I looked at your link Victorie, but there was no blue colouring anywhere in the hymenium.
Michel, what I read in van Brummelen about geophilus:

Asci cylindric-clavate, tapering
downwards, rounded above, 160-200 X 17- 20 p. (according to Seaver rgr6, I.e.:
"200-250 X 15- 18 p,"), 8-spored; the wall not, or scarcely, blue in Melzer's reagent.

So I am now a bit confused?

Michel Delpont, 15-09-2019 12:07

Michel Delpont

Re : Am I right or totally wrong with Ascobolus geophilus?

As stated by Viktorie the reaction is sometimes weak and only on young asci, especially on the walls. Maybe your Melzer is not focused enough?

I hope you will find new apothecies to be able to specify the determination.

Michel.

Maria Plekkenpol, 15-09-2019 17:56

Re : Am I right or totally wrong with Ascobolus geophilus?

Thank you both!!