02-07-2025 17:26
Yanick BOULANGERBonjourRécolté sur une brindille au fond d'un fo
02-07-2025 09:32
Nicolas VAN VOOREN
Hello, bonjour.Here is the paper I'm searching for
30-06-2025 16:56
Lydia KoelmansPlease can anyone tell me the species name of the
01-07-2025 23:37
Josep Torres
Hello.A Pleosporal symbiotic organism located and
30-06-2025 12:09
Edvin Johannesen
This tiny, rather "rough" erumpent asco was found
30-06-2025 06:57
Ethan CrensonHi all, Another find by a friend yesterday in Bro
30-06-2025 14:45
Götz Palfner
This is a quite common species on Nothofagus wood
25-06-2025 16:56
Philippe PELLICIERBonjour, pensez-vous que S. ceijpii soit le nom co
29-06-2025 18:11
Ethan CrensonHello all, A friend found this disco yesterday in
Karstenia?
Enrique Rubio,
03-05-2019 21:38
These apothecia grew in a decorticated branch of hardwood of 10 mm thick, fallen to the ground, product of a pruning.The hymenium is dextrinoid and the ascospores are multiseptate. I think in Karstenia as a good genus for it.What do you think?
This collection is from central Spain at 1000 m of altitude, april 6(2019).
Many thanks again
Hans-Otto Baral,
03-05-2019 21:56
Re : Karstenia?
Hi Enrique
With Karstenia I agree. It could be valuable to make a KOH-pretreatment and test in IKI or MLZ (both the same), you will get a blue hymenium (hemiamyloid, not dextrinoid!) and perhaps a small blue apical ring becomes visible under oil immersion, depending on the species. Dextrinoid would mean red in MLZ whereas your pic clearly shows no reaction in MLZ.
Zotto
With Karstenia I agree. It could be valuable to make a KOH-pretreatment and test in IKI or MLZ (both the same), you will get a blue hymenium (hemiamyloid, not dextrinoid!) and perhaps a small blue apical ring becomes visible under oil immersion, depending on the species. Dextrinoid would mean red in MLZ whereas your pic clearly shows no reaction in MLZ.
Zotto
Jason Karakehian,
03-05-2019 22:11
Re : Karstenia?
Hi Enrique, do you observe longitudinal wrinkles on the ascospores at all?
Enrique Rubio,
04-05-2019 01:18
Re : Karstenia?
No, Jason. I haven't observed any ornamentation on the spores.
Enrique Rubio,
04-05-2019 01:46
Re : Karstenia?
From dried, not fresh material:
*Mlz. + KOH-pret. = negative
*IKI + KOH-pret. = reddish, not blue
I haven't observed any bluish apical pore.
*Mlz. + KOH-pret. = negative
*IKI + KOH-pret. = reddish, not blue
I haven't observed any bluish apical pore.
Hans-Otto Baral,
04-05-2019 08:37
Re : Karstenia?
Sorry, but your KOH pretreatment must have been very weak. I cannot imagine that an ostropalen fungus does not turn to an I-blue reaction even if exposed to 1-2% KOH for a few seconds only.