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03-01-2014 23:01

Bometon Javier Bometon Javier

Habitat en JuncusApteocios  irregularmente discoi

03-01-2014 20:43

Piet BORMANS Piet BORMANS

Bonsoir, Aussi  récolté hier sur une tige  mo

03-01-2014 08:17

Piet BORMANS Piet BORMANS

Bonjour, Récolté hier sur une tige  mortes de

03-01-2014 10:29

Ralph Vandiest Ralph Vandiest

Hello,I found this imperfect fungus on cones of p

02-01-2014 20:54

Ralph Vandiest Ralph Vandiest

Hello,I found this species on leaves. Size 0,3m (i

28-06-2013 22:53

Piet BORMANS Piet BORMANS

Est-ce que quelqu'un peut m'aider à déterminer c

02-01-2014 08:47

Pavol Palo

Hi everybody,I found this one on death decay stem

01-01-2014 15:28

Maren Kamke Maren Kamke

Hi again,on the same piece of decidious wood on wh

01-01-2014 19:04

Chris Yeates Chris Yeates

Bonsoir tous - and Happy New Year!I collected this

30-12-2013 10:29

Patrice TANCHAUD

Bonjour,récolte réalisée sur le littoral, sur d

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Microthyrium on Phragmites?
Jenny Seawright, 30-04-2015 21:52
Jenny SeawrightHello all, another query from dead Phragmites stems....

Small black pseudothecia, sections under the microscope making me wonder Microthyrium but with abundant conidia (c. 4 x 1 µm) and no spores.

I found mention of M. nigroannulatum on Phragmites but without spores I'm lost!

With regards
Jenny


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Spooren Marco, 01-05-2015 11:05
Spooren Marco
Re : Microthyrium on Phragmites?
Hello Jenny,

First of all:I doubt if it is Phragmites you have on the first picture, and second, ; I see a lot of conidia at your last picture ?

Best,
Marco
Jenny Seawright, 01-05-2015 19:50
Jenny Seawright
Re : Microthyrium on Phragmites?
Hello Marco,

Thank you for your reply - if not Phragmites I'm not sure what the substrate might have been but possibly a Poaceae stem among the Phragmites?

Conidia were very abundant in all sections I examined so presumably an anomorph?

With regards,
Jenny
Spooren Marco, 01-05-2015 20:39
Spooren Marco
Re : Microthyrium on Phragmites?
Hello Jenny,

  First, I think You have a Phoma or something like that;the texture of your pycnidium is angular, not striate.About the matrix, I do not think it is a Phragmites because of the obvious epidermis on your picture.Is it wooden?

Best,
Marco
Jenny Seawright, 01-05-2015 21:04
Jenny Seawright
Re : Microthyrium on Phragmites?
Hello Marco,

No, definitely a stem, and it appears hollow on the inside - photograph below of the piece collected (top of image) with two sections of Phragmites below.

Sorry I've no better images of the pycnidia, they varied slightly in shape and some appeared to have a small central protuberance.

A bin job methinks!

With regards,
Jenny
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Chris Yeates, 01-05-2015 22:15
Chris Yeates
Re : Microthyrium on Phragmites?
Don't worry Jenny!
Coelomycetes can be frustrating at the best of times and those on Poaceae are among the worst ;-)
best wishes
Chris
Jenny Seawright, 01-05-2015 22:32
Jenny Seawright
Re : Microthyrium on Phragmites?
Thanks Chris - I'm building up a substantial collection of bin jobs!
Jenny