14-02-2026 10:58
Bernard CLESSE
Bonjour à toutes et tous,Pourriez-vous m'aider à
13-02-2026 18:05
Margot en Geert VullingsOn February 9, 2026, we found these small hairy di
02-02-2026 21:46
Margot en Geert VullingsOn a barkless poplar branch, we found hairy discs
13-02-2026 03:30
Tomaz Vucko
Hello! I found these immersed perithecia on a stic
15-02-2026 04:32
Tomaz Vucko
One more specimen that is giving me some descent a
14-02-2026 22:45
Tomaz Vucko
Hy!I would ask for some help determing this specie
09-02-2026 14:46
Anna KlosGoedemiddag, Op donderdag 5 februari vonden we ti
14-02-2026 19:09
Valencia Lopez Francisco JavierHola colegasEstoi interesado en este articulo, Agn
Disques oranges
Louis DENY,
13-02-2020 10:14
Sur bois très décomposé et imbu de feuillu (Betula?), petits disque oranges (diamètre 0.4/0.7 mm) en groupe dense. Poils à apex arrondi, 50µ, avec quelques granulations me semble-t-il. Asques à crochet, J+, spore biseriées, L=80µ. Paraphyses filiformes, à contenu huileux. Spores hyalines, sans gouttes, 1X septées y compris dans l'asque, 11-15 X 2.5-3 µ, legèrement incurvées. Excipulum prismatique.
Merci pour votre aide
Hans-Otto Baral,
13-02-2020 10:47
Re : Disques oranges
Cher Louis!
your micros are very useful, the macro needs more magnification. This must be Arachnopeziza cornuta (= A. trabinelloides). The fungus was repeatedly in this forum.
Zotto
Kosonen Timo,
13-02-2020 10:56
Re : Disques oranges
I agree with Zotto. Practically nonexistent subiculum would fit to A. trabinelloides. If the sample is still fresh, make a mount in water (small drop only), put it to 40X or so and then add excess MLZ on the side of the mount so that it runs under the cover glass. The resin should turn blue, but the reaction lasts only for some minutes and is not visible in dry/herbarium material. ---or if it is only resin that turns blue, I am not 100% sure. I havent seen fresh material that often.
Timo
Hans-Otto Baral,
13-02-2020 11:24
Re : Disques oranges
Interesting! I only know a bluegreen reaction of the orange lipids (carotenoids) in Lugol (or MLZ).
See HB 9256
Zotto
Louis DENY,
13-02-2020 18:39
Re : Disques oranges
Thanks to both of you! I was misled by the lack of subiculum.