17-12-2025 18:35
Michel Hairaud
Bonjour à tous/Hi to everyone I am passing along
15-12-2025 15:48
Danny Newman
Melanospora cf. lagenaria on old, rotting, fallen
15-12-2025 15:54
Johan Boonefaes
Unknown anamorph found on the ground in coastal sa
15-12-2025 21:11
Hardware Tony
Small clavate hairs, negative croziers and IKI bb
15-12-2025 07:09
Danny Newman
indet. Rutstroemiaceae sp. on unk. fallen leavesMc
15-12-2025 07:05
Danny Newman
Pseudosclerococcum golindoi (det: Zotto)near Cosb
15-12-2025 11:49
Danny Newman
ITS sequences from the following two collections B
15-12-2025 12:34
Danny Newman
indet. Rhytismataceae on oak leafnear Purchase Roa
Laetinaevia-like?
Chris Yeates,
26-10-2017 21:47
This was found growing quite abundantly on a decorticated area on a thin (6mm diameter) Fraxinus twig. Pale peach-coloured when fresh, and small (max. 170µm diameter).Excipulum composed of rather thick-walled cells.
Asci 8-spored; in IKI apparently no reaction - possibly very faint hemiamyloid, though this might be an artefact; strongly blue in KOH > MLZ). Difficult to see but probably croziers +. Paraphyses not swollen at apex, without guttules.
Ascospores ellipsoid to (mostly) broadly reniform / bean-shaped; guttules as in the images.
Any thoughts would be welcome.
Chris
Hans-Otto Baral,
26-10-2017 22:02
Re : Laetinaevia-like?
Hi Chris
with such a strong amyloid reaction the unpretreated asci should distinctly react red! Maybe your Lugol lacks iodine?
No idea what it is. A closeup of the apical ring could be valuable
with such a strong amyloid reaction the unpretreated asci should distinctly react red! Maybe your Lugol lacks iodine?
No idea what it is. A closeup of the apical ring could be valuable
Chris Yeates,
26-10-2017 22:27
Re : Laetinaevia-like?
Thanks Zotto
yes I'll have another go tomorrow, mounting in pure IKI, rather than running it into a water mount as I did in this instance (although that has usually worked well for me with many other species).
LG
Chris
yes I'll have another go tomorrow, mounting in pure IKI, rather than running it into a water mount as I did in this instance (although that has usually worked well for me with many other species).
LG
Chris
Hans-Otto Baral,
26-10-2017 22:38
Re : Laetinaevia-like?
It is the better method to add IKI to water (not too much water) because only then you can view the change from blue to red in some taxa. But it must be concentrated enough.