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Margot en Geert VullingsOn the same betula branch as of the Trimmatostroma
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Gilles Corriol
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acrspermum
Didier ARGAUD,
04-01-2007 14:12
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
Björn Wergen,
14-01-2007 14:21
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
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
Didier