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Mot de passe perdu?

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 SochorovÃ¡ (EgertovÃ¡)

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

Castillo Joseba

Castillo Joseba

Me mandan el material de Galicia, España, recolec

11-04-2026 10:19

Bientôt, un nouveau livre important

Michel Hairaud

Michel Hairaud

Chers amis d'Ascofrance , voici une très bonne no

11-04-2026 10:10

An important new book

Michel Hairaud

Michel Hairaud

Dear Ascofrance members, here is some very good ne

10-04-2026 23:22

Pyreno on Phragmites australis

Gernot Friebes

Hi,ascospores are 1- to 3-septate, approximately

10-04-2026 15:51

Botrytis ficariarum & Peronospora ficariae?

William Slosse

William Slosse

Hello everyone, On 08/04/26, I found a growth sit

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Orbilia sarraziniana or Orbilia luteorubella ?

Ethan Crenson, 30-05-2024 07:23

Did I pay close attention to the lecture Zotto gave two weekends ago? Here's my chance to find out.

This Orbilia is from a decorticated branch of hardwood, probably found on the ground (it was not my collection, it was handed to me) from a New York City park last weekend.

I initially thought it might be Orbilia luteorubella, but after staring for a while at the orientation of the spores in the asci I have changed my opinion. Now I tend to think that it is Orbilia sarraziniana.

Spores:
fusiform-clavate, with one acute end and one rounded end. The spore body a long, sometimes winding form ending at the pointed end of the spore:
4.9-7.5 x 1.3-1.6µm.

The spore body 2-4µm in length

Asci:
22.9-27.7 x 3.4-3.9µm (I know this probably seems short.)
truncate apex, furcate base. It looks to me that the upper spores have spore bodies at the bottom, lower spores with spore bodies up.

Paraphyses
capitate, with material covering the apex
19.8 x 3.1µm

I don't have images of the conidia, unfortunately. In fact, the bulb blew on my microscope and I am waiting for a replacement, so I can't check for them until the replacement bulb comes in the mail.

Is it possible to tell from this evidence?

Many thanks in advance,

Ethan

Hans-Otto Baral, 30-05-2024 09:36

Hans-Otto Baral

Re : Orbilia sarraziniana or Orbilia luteorubella ?

Hi Ethan

indeed I would classify this as O. sarraziniana. Besides spore orientation O. luteorubella and O. rosea have longer spores, though this much overlaps.

Although the upper spores are oriented inversely I would anyway speak of the acute spore end with the SB as the upper end and orient them also on plates with SB upwards.

We had some collections of this group in which there was much variation with both directions occurring near the ascus apex and at the lower end of the pars sporifera.

So the place of the SB is the indication, and you can imagine when dealing with dead spores you may easily think the acute end is the lower end.

Zotto

Ethan Crenson, 30-05-2024 14:41

Re : Orbilia sarraziniana or Orbilia luteorubella ?

Hi Zotto,

Thank you as always for your help!

Ethan