19-02-2026 17:49
Salvador Emilio JoseHola buenas tardes!! Necesito ayuda para la ident
01-03-2026 08:55
Michel Hairaud
Bonjour , Je souhaiterais recevoir cet article :Â
28-02-2026 14:43
Alain GARDIENNET
A new refrence desired :Svanidze, T.V. (1984) Novy
27-02-2026 17:51
Michel Hairaud
Bonjour, Quelqu'un peut il me donner un conseil p
29-11-2024 21:47
Yanick BOULANGERBonjourJ'avais un deuxième échantillon moins mat
27-02-2026 16:17
Mathias Hass
Hi, Found this on Betula, rather fresh fallen twi
Hypoxylon macrocarpum or similar?
Garrett Taylor,
22-03-2020 01:59
I 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
Jacques Fournier,
22-03-2020 18:30
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
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.
Jacques Fournier,
23-03-2020 12:22
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
Re : Hypoxylon macrocarpum or similar?
Thank you again, and thanks for sharing the website!
Garrett Taylor,
23-03-2020 20:45
Re : Hypoxylon macrocarpum or similar?
Thank you again, and thanks for sharing the website!