Accès membres

Mot de passe perdu? S'inscrire

18-09-2020 22:38

Castillo Joseba Castillo Joseba

De esta mañana  en corteza de fagusHe visto unos

19-09-2020 11:04

Angel Pintos Angel Pintos

Hello,anybody has?Pseudoguignardia scirpi Gutner,

18-09-2020 22:49

Marek Capoun Marek Capoun

Hello everybody,I need help with the determination

01-03-2017 17:18

Enrique Rubio Enrique Rubio

Hi to everybodyCould you help me with a pdf copy o

18-09-2020 12:45

Joaquin Martin

Hi,A colleague gave me this Pyrenomycete on Fagus

18-09-2020 09:28

Viktorie Halasu Viktorie Halasu

Hello,this looks like Lophodermium petiolicolum, e

18-09-2020 10:15

Zugna Marino Zugna Marino

Buon giorno a tutti i specie che, a pr

18-09-2020 10:14

Zugna Marino Zugna Marino

Buon giorno a tutti i specie che, a pr

17-09-2020 11:07

Joop van der Lee Joop van der Lee

Normally Pilobolus are found on horse dung but thi

17-09-2020 09:19

Joop van der Lee Joop van der Lee

Found P. oedipus on horse dung yesterday.A perfect

« < 1 2 3 4 5 > »
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?

  • message #1231
Björn Wergen, 14-01-2007 14:21
Björn Wergen
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...).

Didier ARGAUD, 14-01-2007 21:06
Merci pour la réponse