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06-12-2024 16:10

B Shelbourne B Shelbourne

• Macro and habitat appear mollisioid.• Mollis

19-11-2024 00:36

Pérez del Amo Carlos Manuel Pérez del Amo Carlos Manuel

Hace unos días encontramos numerosos ejemplares d

02-12-2024 19:02

Margot en Geert Vullings

On a fallen branch, probably Acer, we found these

05-12-2024 16:38

Karl Soler Kinnerbäck

A Melastiza from Padjelanta, alpine Sweden, on cal

06-12-2024 10:28

Jiri Malicek

Hello, would anybody help me with ID of this unusu

05-12-2024 20:43

Juuso Äikäs

I found these black pyrenos a few days ago growing

05-12-2024 20:48

Stoykov Dimitar Stoykov Dimitar

Hallo colleagues,I need to consult a xylarialean c

30-11-2024 18:43

Yanick BOULANGER

BonjourVoici une récolte du 31/10/2024 sur boisJe

05-12-2024 18:11

Yanick BOULANGER

Bonsoir Quelqu'un a t-il une idée de ce que c'es

04-12-2024 18:31

David Chapados David Chapados

Would this be Jackrogersella or Hypoxylon?https://

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Helotiales on cone again
Juuso Äikäs, 08-11-2024 17:36
Recently I posted here my finding of small white apos growing on a fallen Picea abies cone. I found these once again, but this time on a fallen Pinus sylvestris cone.

This species seems rather distinctive, and apparently at least locally common as well. So I decided to post this finding as well — this time with better data. Could this be identified even to family level?

The apos are sessile-substipitate and 0.2 - 0.4 mm wide. Asci 8-spored, IKI+(b), croziers present. Paraphyses narrowly cylindrical, with multiguttulate tips; similar cells on the margin. Extal excipulum with angular-globose cells and round guttules.

Spores with two large guttules and some smaller ones. Some spores appeared to have a gelatinous sheath. Measurements:

(15.1) 15.8 - 19.3 (20.4) × (3.4) 3.7 - 4.2 (4.4) µm
Q = (4) 4.3 - 4.8 (5.1) ; N = 10
Me = 17.9 × 4 µm ; Qe = 4.5

Asci:

69.1 - 90 × 9.8 - 12.4 µm
Q = 7 - 7.4 ; N = 3
Me = 79 × 10.9 µm ; Qe = 7.2

 
Hans-Otto Baral, 08-11-2024 18:14
Hans-Otto Baral
Re : Helotiales on cone again
This doesn't look the same as that on Picea if you mean that.

The apical ring is rather thick and the apex very conical, also the VBs in the paraphyses are restricted to the apex. H. epiphyllus would be multiguttulate in the cortical excipulum.

I am unsure for a genus, rather Calycina than Hymenoscyphus?
Juuso Äikäs, 08-11-2024 18:18
Re : Helotiales on cone again
I mean this one from a little earlier: 


The Hymenoscyphus was on a Pinus cone as well (on the core part).
Hans-Otto Baral, 08-11-2024 21:38
Hans-Otto Baral
Re : Helotiales on cone again
Ah o.k., now I remember. The paraphyses look like in Hymenosc. sparsus but that is a stipitate fungus on leaves, with typical Hym.-type of apical ring.