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14-02-2025 23:15

Tomaz Vucko Tomaz Vucko

Hy! Last one for today.How would you identify thi

14-02-2025 21:55

Alan Smith

hello there, this host is a dead stem of Chamerion

14-02-2025 20:15

Tomaz Vucko Tomaz Vucko

Hello! Another species found in the same place as

14-02-2025 19:15

Tomaz Vucko Tomaz Vucko

Hello!I am trying to identify some of the unidenti

14-02-2025 18:31

Francois Guay Francois Guay

Here’s an interesting unidentified ascomycete I

14-02-2025 16:00

Lothar Krieglsteiner Lothar Krieglsteiner

during a workshop on corticiaceous fungi this was

13-02-2025 07:41

Vasileios Kaounas Vasileios Kaounas

first time I encounter it. I didn't expect to see

14-02-2025 12:57

Gernot Friebes

Hello,we are looking for ideas regarding this pyre

14-02-2025 00:22

Jorian Eijkelboom Jorian Eijkelboom

On 6 february 2025 i stumbled upon a leafspot on P

13-02-2025 22:39

Yanick BOULANGER

BonsoirPetits périthèces noirs d'environ 0.5 mm

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Pezicula sp. on Pyrularia pubera - North Carolina, USA
Danny Newman, 24-11-2023 21:38
Danny Newman
higher resolution images available at inaturalist.org/observations/180579535

on standing, dead herbaceous central stems of Pyrularia pubera (see last image)

hymenial surface incrusted with abundant, dextrinoid (?), stellate crystals

Stage micrometer was recently lost, and so sadly I have no measurements at this time.
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Hans-Otto Baral, 25-11-2023 10:30
Hans-Otto Baral
Re : Pezicula sp. on Pyrularia pubera - North Carolina, USA
I remember to have seen in Pezicula such redbrown granules extruding from the hymenium (paraphyses) when adding Lugol. I assume you used Melzer. Important would be to check a KOH-pretreated probe with MLZ to see the deep blue apical rings (hemiamyloidity!).

For a species name I can say nothing.
Danny Newman, 25-11-2023 17:30
Danny Newman
Re : Pezicula sp. on Pyrularia pubera - North Carolina, USA
Zotto,

Thank you for the reply.  I use Lugol's when working with discomycetes whenever possible, at your long ago instruction, this being no exception.  I made sure that a plentiful supply of it would be available for our participants to use at the Korf Foray and subsequence Purchase Knob AscoBlitz.  One of the same dropper bottles provided for those events was used in the preparation of this sample.
Hans-Otto Baral, 25-11-2023 20:34
Hans-Otto Baral
Re : Pezicula sp. on Pyrularia pubera - North Carolina, USA
Great! I concluded from the seemingly negative ascus apex that it must be Melzer. I only remember one species with inamyloid asci - not sure which it was. All others react pretty pure red but after KOH deep blue.