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10-05-2026 23:17

Andreas Gminder Andreas Gminder

Hello,today we found in a moist steep decidous for

14-05-2026 05:36

Ethan Crenson

Hi all,  I haven't paid much attention to Lachnu

16-03-2011 14:31

roman vargas alberto

Hi. I would like some opinion about this Peziza

11-05-2026 12:32

Bernard CLESSE Bernard CLESSE

Pourriez-vous m'aider à identifier cette héloti

13-05-2026 15:26

François Freléchoux François Freléchoux

Bonjour,Voici une récolte faite il y a quelques j

12-05-2026 15:41

Nicolas VAN VOOREN Nicolas VAN VOOREN

Dear Ascolovers, especially interested in Pezizale

13-05-2026 12:05

Thierry Blondelle Thierry Blondelle

Bonjour à tous,J'aimerais avoir confirmation de c

28-04-2026 20:07

Lothar Krieglsteiner Lothar Krieglsteiner

... on twig in the air at standing Ceratonia siliq

27-04-2026 20:52

Lothar Krieglsteiner Lothar Krieglsteiner

Found on hanging tiwg of Olea europaea in dried-ou

11-05-2026 20:22

Lothar Krieglsteiner Lothar Krieglsteiner

on attached twig of standing Ficus caricaquite uns

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Rutstroemia on Acer campestre leaves
Marcus Yeo, 27-10-2013 21:12
I recently found this Rutstroemia growing on dead leaves (mainly on the petioles) of Acer campestre.

Apothecia are up to 3 mm diameter with a short stalk; the hymenium is pale brown with a darker margin.


Excipulum is a textura oblita in part, with thin-walled cells in part.


Asci are 85-100 x 10 µm, with tips staining blue in IKI. Spores are single-celled, 12-14 x 4.5-5 µm, with 2 large oil bodies and many minute oil bodies.


Paraphyses are 3-4 µm wide, with oil-filled contents in the upper part.


The colour of the apothecium and other characters would appear to rule out Rutstroemia (Lanzia) luteovirescens, which is characteristic of Acer. Microscopic characters don't seem to fit well with other species found on decaying tree leaves, so I'm struggling to make an identification.


I would be grateful for any help.

Marcus

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Hans-Otto Baral, 27-10-2013 22:08
Hans-Otto Baral
Re : Rutstroemia on Acer campestre leaves
Hi Marcus

this is Rutstroemia "kalevi".  You find it in folder Rutstroemia.

The name might be a creation by the late Terry Palmer, but I do not remember the etymology.

An undescribed species, though perhaps hidden under some old name, who knows.

Apparently very rare!

Zotto
Marcus Yeo, 28-10-2013 23:02
Re : Rutstroemia on Acer campestre leaves
Zotto

Thank you. That explains why I couldn't identify it from the standard floras and keys!

Marcus