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Lophiostomaceae
Hans-Otto Baral, 03-07-2009 12:59
Hans-Otto BaralHi
Here is a pyreno on stem of Reynoutria japonica from Chemnitz.

Spores *31-35 x 5.5-6 µm, in shape very typical of Lophiostoma. But perithecia superficial, with an abundant subiculum of broad brown hyphae, with rounded obtuse neck.

Zotto
  • message #8418
Hans-Otto Baral, 03-07-2009 13:02
Hans-Otto Baral
Re:Lophiostomaceae
Once more. Hyphae are about 5-7 µm wide.

No Orbilia :-) I sometimes get pyrenos to determine....
  • message #8419
Perz Piotr, 03-07-2009 13:02
Re:Lophiostomaceae
Hi Zotto,

did you found an Orbilia on this substrate ?

Piotr
Jacques Fournier, 03-07-2009 13:21
Jacques Fournier
Re:Lophiostomaceae
Hi Zotto,
this sounds like Herpotrichia macrotricha. The ostiolar region usually appears paler, whitish to grey, especially when moistened.
Cheers,
Jacques
Hans-Otto Baral, 03-07-2009 15:23
Hans-Otto Baral
Re:Lophiostomaceae
Hi Jacques

yes, you are right. At least with Dennis I can confirm your opinion, thanks!

Zotto
Jacques Fournier, 03-07-2009 15:33
Jacques Fournier
Re:Lophiostomaceae
there is a good account on this taxon by Barr 1984, in Mycotaxon 20 pp 8-9. Once you know it you can't miss it again!
Jacques
Bernard Declercq, 12-07-2009 13:43
Bernard Declercq
Re:Lophiostomaceae
Hi Jacques et Zotto,
H. macrotricha occurs on Rubus fruticosus in the belgian Ardenns.
Speaking about Herpotrichia, is H. rubi different from H. herpotrichoides, two species originally described by Fuckel?
Bernard
Jacques Fournier, 12-07-2009 14:00
Jacques Fournier
Re:Lophiostomaceae
Hi Bernard,
indeed Barr (1984) synonymizes H. rubi and H. herpotrichioides.
Cheers,
Jacques