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18-11-2017 21:19

Edmond POINTE Edmond POINTE

Bonjour,Je suuis perplexe quand a mettre un nom su

18-11-2017 14:26

Bernard Declercq Bernard Declercq

Dear forum members,Who can supply me a pdf of foll

18-11-2017 16:45

Gilbert MOYNE

Voici un asco qui me pose problème et je n'arrive

17-11-2017 21:10

Garcia Susana

Sobre madera en zona muy húmeda.No consigo identi

18-11-2017 07:44

Andrés Valverde Valera Andrés Valverde Valera

Bonjour, Je ne sais pas si peut être cette espèc

16-11-2017 15:41

Zoltan Lukacs Zoltan Lukacs

Hello,I have absolutely no idea on this one. (Subs

17-11-2017 06:43

Ethan Crenson

From the Bronx, NYC on Platanus × acerifolia. On

10-11-2017 21:23

Garcia Susana

HolaPeritecio inmerso en madera de haya.No llego a

15-11-2017 23:50

Danny Newman Danny Newman

note cruciate/sulcate ostiolar necks. paraphyses

16-11-2017 17:01

Pavol Palo

Hi, I've found this ascomycete on a dead lying s

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Cistella on leaves
Marja Pennanen, 18-06-2016 10:48
Hello forum after a long time,

I found these whitish, about 0,2-0,3 mm wide fruitbodies today on leaves of possibly Ribes nigrum.
The spores are about 7-9x2.
The asci are about 35-45x5-7, IKI blue and the paraphysesare a bit lanceolate, about 2-3 wide.
The hairs seems to belong to Cistella, they are nearly all the way coarse, about 20-50x3-6. Their shape varies much.

The species on leaves, that I have definitions, have hairs either coarse on the top or are septate...
Any fresh ideas?

Summer has arrived even here in northern Europe: Marja
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Marja Pennanen, 16-07-2017 16:26
Re : Cistella on leaves
Hello,

I got to come back to this in my opinion even common species here, because I've seen it a lot at different places. I have changed my opinion of the genus. Now I suppose it is a Fuscolachnum.

The apos can be 0,6 mm wide, they come quite flat, when older.
The hairs on the underside are brown. They may reach even the lenght of 70 micrometers. Paraphyses are not very lanceolate, sooner filiform.

The closes one is F. borealis, but these hairs are seldom septate and Ribes is not wery close to Juniperus.

Any fresh opinions?

Marja

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Hans-Otto Baral, 16-07-2017 21:04
Hans-Otto Baral
Re : Cistella on leaves
Yes, Fuscolachnum seems very probable. And you can exclude Rubus as host? F. misellum?
Marja Pennanen, 17-07-2017 13:32
Re : Cistella on leaves
Dear Zotto,

these certainly grow on Ribes nigrum leaves, on the uncerside, where exists yellow spots (resinous).
I have found F. misellum on Rubus idaeus leaves and they have an orange shade, which these do not have. Besides the microscophy of these is bigger and these have not enought septas at hairs.

F. borealis has been found on green needles of Juniperus communis, aren't they resinous...

Marja