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05-11-2025 11:33

Pierre Repellin

Bonjpur,J'ai trouvé, sur une hampe florale d'Alli

04-11-2025 09:07

Josep Torres Josep Torres

Hello.A suspected Hymenoscyphus sprouting on a thi

04-11-2025 12:43

Edvin Johannesen Edvin Johannesen

Hi! One more found on old Populus tremula log in O

04-11-2025 14:53

Josep Torres Josep Torres

Hello.Very small, globose, mucronate perithecia, b

03-11-2025 21:34

Edvin Johannesen Edvin Johannesen

These tiny (0.4-0.5 mm diam.), whitish, short-stip

03-11-2025 19:41

David Chapados David Chapados

Hi,Does anyone knows which genus could this be? G

28-10-2025 15:37

Carl Farmer

I'd be grateful for any suggestions for this strik

03-11-2025 16:30

Hans-Otto Baral Hans-Otto Baral

Hello I want to ask you if you have found this ye

01-11-2025 09:14

Francis Maggi

Bonjour,Trouvé sur Xanthoria parietina à Valdebl

28-10-2025 19:33

Nicolas Suberbielle Nicolas Suberbielle

Bonjour à tous,Je voudrais votre avis sur cette r

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On Rhubarb
Marja Pennanen, 20-06-2013 22:33
Seems, that determination is now just impossible for me.
Today I collected some seemingly Orbilias on rhubarb.
In microscope I saw hairs and they are visible in photos, too.
No Obbilia, but maybe some Unguiculella.

These are about 0,3-0,5 mm wide.
Spores are about 10-15x2-3 and asci 40-50x6-8, IKI-.
Paraphyses are narrow, swollen at the tips.
Hairs are about 30-40x3-4, pointed and seems glassy, but no reaction with KOH.

Raitviirs opus gave no answer to my problem: Marja
  • message #23993
  • message #23993
  • message #23993
Hans-Otto Baral, 21-06-2013 07:50
Hans-Otto Baral
Re : On Rhubarb
Hyalopeziza raripila which I have in my Iridinea folder in Naevioideae. Asci may react red but are also negative.
Marja Pennanen, 21-06-2013 09:15
Re : On Rhubarb
Thank you!
That it is, new for me and propably North Carelian :)

Shame on me, it is in Raitviir's opus: Marja