16-07-2025 17:34
Bernard Declercq
Hello,I have trouble distinguishing above mention
14-07-2025 11:20
Michel Hairaud
Bonjour, Voici une espèce de (?) Hyaloscyphace
16-01-2023 21:31
Riet van Oosten
Hello, Nearby the find of Calycina claroflava on
14-07-2025 17:55
Yanick BOULANGERBonjourAutre dossier laissé en suspendJe viens de
14-07-2025 11:17
Yanick BOULANGERBonjourJ'ai un dossier Jackrogersella qui est rest
14-07-2025 15:52
Gernot FriebesHi,I wanted to share this collection on Rubus idae
14-07-2025 13:37
Gernot FriebesHi,do you think this collection could be R. ulmari
Xylaria aff. cinerea from Ethiopia with strange porus reaction (hemiamyloid?)
Andreas Gminder,
30-01-2020 22:56
Hello dear collegues,on re-examining my collections from the ethiopian rain forest, I came to this little Xylaria species which I can not identify.
Fruitbody club-shaped with distinct stalk, appr. 4 cm high (2 cm club, 2 cm stipe), greyish, with distinct black squamules dispersed on the club. Growing on very mossy wood.
Asci very long-stalked, 8-spored. Apical pore higher than broad, appr. 5 µm high, very distinct even in water. Spores dark brown, 23-28 x 7,8-8,2 µm, with sigmoid germ-slit not reaching the spores ends (appr. 15 µm long, ending 6-7 µm bevor the spore end)
Also it had a strange porus reaction, being blue in Lugol, redbrown in Melzers, violett in Lugol with KOH pre-treatment. When to the lugol preparation (blue reaction) KOH is added, the reaction vanishes completely. Is this called a hemiamyloid reaction?
ANy suggestions?
thank you and all the best,
Andreas
Jacques Fournier,
31-01-2020 15:07
Re : Xylaria aff. cinerea from Ethiopia with strange porus reaction (hemiamyloid?)
Hi Andreas,
from your photos and observations, I would suggest X. schweinitzii as the closest species, with some small differences in superficial coating and spore shape, but X. schweinitzii is widely distributed in Tropics and fairly variable.
I do not think the ascus plug can termed hemiamyloid but the reactions you got are unusual in Xylaria, especially the reaction with Melzer.
if you have the possibility to have this sample cultured and sequenced, a comparison with X. schweinitzii might be worth it.
Cheers,
Jacques
Andreas Gminder,
31-01-2020 21:55
Re : Xylaria aff. cinerea from Ethiopia with strange porus reaction (hemiamyloid?)
Dear Jacques,
merci beaucoup!
Xylaria schweinitzii would be a little bit disappointing. I thought it to be something "better", as the surface of the club didn't look anything like schweinitzii.
Marc Stadler offered me to culture the species and a sequence is done at the moment in Senckenberg anyway. So I will compare and let you know.
all the best,
Andreas
merci beaucoup!
Xylaria schweinitzii would be a little bit disappointing. I thought it to be something "better", as the surface of the club didn't look anything like schweinitzii.
Marc Stadler offered me to culture the species and a sequence is done at the moment in Senckenberg anyway. So I will compare and let you know.
all the best,
Andreas