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29-08-2025 05:16

Teleomorph of Dendrostilbella smaragdina ?
Francois Guay Francois Guay

I think I may have found the teleomorph of Dendros

29-08-2025 19:04

Yellow apothecia on cow dung without hairs - Cheilymenia spec.?
Thomas Flammer

Spores 21.2 - 26.2 x 8.3 - 11.3 µm - Q: 2.20 - 2.

28-08-2025 17:24

Literatur request J. Berthier, Typhula
Thomas Flammer

I know, that this is not the real topic of this fo

24-08-2025 21:59

Podospora
Edmond POINTE Edmond POINTE

Bonsoir amis mycologues,Trouvé sur crottin de che

27-08-2025 12:02

On Abies alba macroscopically similar to Propolis sp.
Pavol Palo

Hello dear friendsI would like to ask for sharing

25-08-2025 17:37

Petit asco indéterminé
François Freléchoux François Freléchoux

Bonjour,Nous avons trouvé samedi dernier à l'ét

24-08-2025 21:30

Orbilia dryadum ?
Ethan Crenson

Found yesterday in a New Jersey park.  An Orbilia

21-08-2025 18:09

Semble Thecotheus
Edmond POINTE Edmond POINTE

Bonjour Amis mycologues.Trouvé sur crottin de che

22-08-2025 18:10

Protocrea ?
Ethan Crenson

Hello everyone,  I found what I think might be P

20-08-2025 19:04

Adelphella babingtonii - lacking much brown pigment
Ethan Crenson

Hello, This asco was found on the same wood as my

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Hypoxylon macrocarpum or similar?
Garrett Taylor, 22-03-2020 01:59
Garrett TaylorI found this in New York State. On Acer.
Spore measurements:
(10.5) 11.5 - 13.4 (15.2) × (5.4) 5.8 - 6.5 (6.6) µm
Q = (1.7) 1.8 - 2.3 (2.8) ; N = 26
Me = 12.4 × 6.1 µm ; Qe = 2
Germ slits the length of spore.
Didn't see any blueing with Melzer's, but there weren't lots of mature asci.
Green pigment in KOH.
I don't believe I have a very good reference for these, all I really have is Wergen 2018 and it doesn't seem to be in there.

A few more images here:
https://www.inaturalist.org/observations/40215428

  • message #62224
  • message #62224
Jacques Fournier, 22-03-2020 18:30
Jacques Fournier
Re : Hypoxylon macrocarpum or similar?
Dear Garrett,

your Hypoxylon does'nt look like macrocarpum, I would rather look around H. fuscopurpureum., whiich is characterized by pyriform dark brown ascospores with a perispore not dehiscing in KOH. I could not see the images through your link.

To study Hypoxylon, I suggest you go to this website where all important features to record are listed, something to do before using the keys.


Can you please show us the spores?

Best,

Jacques
Garrett Taylor, 23-03-2020 01:28
Garrett Taylor
Re : Hypoxylon macrocarpum or similar?
Hope you can see these well enough. My micro camera isn't the best, the contrast is poor, but you can sort of make out the germ slit on the lower spore in the right-hand ascus. Thanks for the link. I will need to work on understanding some of these concepts.
  • message #62246
  • message #62246
Jacques Fournier, 23-03-2020 12:22
Jacques Fournier
Re : Hypoxylon macrocarpum or similar?
Hi Garrett,

the blackish heteropolar ascospores fit well H. fuscopurpureum, you can assign this name to your fungus. Only the apical ring deviates if it does not turn blue with iodine. It is easier to make out on immature asci.

Nice find, to my knowledge this species is rarely recorded.

Best,

Jacques
Garrett Taylor, 23-03-2020 20:45
Garrett Taylor
Re : Hypoxylon macrocarpum or similar?
Thank you again, and thanks for sharing the website!
Garrett Taylor, 23-03-2020 20:45
Garrett Taylor
Re : Hypoxylon macrocarpum or similar?
Thank you again, and thanks for sharing the website!