06-05-2024 10:02
François BartholomeeusenGood morning,At the end of an excursion in De Zegg
07-05-2024 00:04
Ethan CrensonA friend found these black gelatnous cups on a twi
05-05-2024 09:59
Gernot FriebesHello,I failed to identify this anamorph, which gr
19-04-2015 20:20
Enrique RubioHi again Could you help me with this paper? NANN
30-04-2024 16:22
François BartholomeeusenDear forum members,On April 25 2024, I found one f
03-05-2024 18:04
Riet van OostenHello, Found by Laurens van der Linde on Rubus fr
Karstenia?
Enrique Rubio,
03-05-2019 21:38
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
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.