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18-09-2020 22:38

Castillo Joseba Castillo Joseba

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Hello everybody,I need help with the determination

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Enrique Rubio Enrique Rubio

Hi to everybodyCould you help me with a pdf copy o

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Joaquin Martin

Hi,A colleague gave me this Pyrenomycete on Fagus

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Viktorie Halasu Viktorie Halasu

Hello,this looks like Lophodermium petiolicolum, e

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Zugna Marino Zugna Marino

Buon giorno a tutti i colleghi.la specie che, a pr

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Zugna Marino Zugna Marino

Buon giorno a tutti i colleghi.la specie che, a pr

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Joop van der Lee Joop van der Lee

Normally Pilobolus are found on horse dung but thi

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Joop van der Lee Joop van der Lee

Found P. oedipus on horse dung yesterday.A perfect

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acrspermum
Didier ARGAUD, 04-01-2007 14:12
Bonjour à tous

Connaissez-vous l'espèce suivante: cf photo
C'est un acrospermum mais lequel, il semble different (macroscopiquement) de compressum, que je connais déjà. La microscopie semble la même.
Substrat: herbacées mais pas sur ortie.
Est ce graminum ? ou autre?

Didier
  • message #1231
Björn Wergen, 14-01-2007 14:21
Björn Wergen
Re:acrspermum
Dear Didier,

I know about three species in the genus Acrosperum: A. compressum, A. graminum and A. pallidulum. All three are hard to determine because they have nearly the same characteristics.
A. compressum usually grows on old stems of Urtica and is 2-4 mm high, with a grey-brown surface. Spores are about 400 µm long.
A. graminum grows on little stems of graminaceen and has smaller fruitbodies (1-2,5 mm). The color is brownish, pale-brown.
A. pallidiulum also has pale-brown fruitbodies but spores around 300µm long and grows on dead stems of "Galium". I just know this species from literature but didn't find it in nature yet.

Differences are flowing into each other and it would not surprise me, if there are only 2 species instead of three or more (I do not know about others...).

Greetings,
Kaz
Didier ARGAUD, 14-01-2007 21:06
Re:acrospermum
Merci pour la réponse
Didier