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24-07-2015 16:25

Peter Thompson

Hello Everyone,I have found some groups of immerse

24-07-2015 12:28

Lepista Zacarias

Hi everyone,Last year I found an ammount of specim

23-07-2015 14:06

Leandro Sánchez Leandro Sánchez

Sur Salix, diamétre max  6-7 mm.KOH -Cordialemen

22-07-2015 23:35

Joaquin Martin

HiCollected about branch in riparian forest, coexi

22-07-2015 16:07

Dartanha Soares Dartanha Soares

Hello to all, I would like to hear your opinion a

22-07-2015 21:55

John Leach

Hello all I found this Calonectria growing on old

22-07-2015 10:50

Gernot Friebes

Hi, I'm looking for help with another peculiar as

22-07-2015 13:31

Thorben Hülsewig

Hi there On the 16.7.15 i found under a rotten wo

21-07-2015 21:59

Pavol Palo

Hello friendsCan you give me a hand with the deter

21-07-2015 20:59

Thorben Hülsewig

Hi there Today i found in the forest on the groun

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Red Staining Ascomycete on Epilobium hirsutum
Peter Thompson, 24-07-2015 16:25
Hello Everyone,

I have found some groups of immersed black ascomycetes which are breaking through the epidermis of an old and quite fragile stem of Epilobium hirsutum. The host tissue is distinctly reddened around the groups of fruit bodies.

The frbs are cylindrical, but somewhat flattened, and have round ostioles, which are blood red from the stain.

The species which I know to cause staining are all eliminated:
Leptospora rubella - spores filiform and much longer
Lophiostoma origani var. rubidum - ostioles of this species are slotlike
Leptosphaeria purpurea - no swollen cell present in the spores

All mature spores are 3-septate, slender, with a few drops and are almost pointed at each end. The asci contain 8 spores and their tips are blued by lugol. The excipulum is blackish brown in the upper half and greenish brown lower down. No paraphyses were seen.  

I have attached a photo of the fruit bodies and a sketch of the microscopy and wonder if anyone has any suggestions as to the identity?

Thank you,
With Best WIshes,
Peter.


  • message #37088
  • message #37088