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Godronia cassandrae on a herbaceous plant?
François Bartholomeeusen,
29-05-2018 14:33
In a newly mown, very humid, flowery meadow on the very wet edge of a brook my friend found several ascomata on a herbaceous plant. My first thought was Stictis but turned soon into Grodronia with the following characteristics:
Macroscopic: the fruit bodies break through the epidermis and when removed they leave an identation in the plant. No stroma found. First they are deeply cup-shaped and later they spread out into a light grey disc of +/- 1 mm. In an early stage the excipulum forms a serrated edge, later and in humid condition the grey hymenium rises above the excipulum.
Micoscopic:
Asci: 63 x 7 µm, IKI- and no croziers
Paraphyse: filiform 56-70 x 3-3,5 µm, septated
Spores: filiform, 41,92-65,47 x 2,46-3,66 µm; GEM= 52,35 x 3 µm ; Q= 17,4
I can't determine the substrate. I think a herb rather than wood.
I have little literature and with the key I have I come to Godronia cassandrae. But there are several deviations: I find no clear croziers, no reaction in IKI or Melzer and no woody substrate. The stem is hollow and round with a diameter of 2,5 mm and I notice a red-purple discolouration.
Can someone help me with this discovery, thank you in advance.
Best regards,
François Bartholomeeusen
Marcel Heyligen,
29-05-2018 14:43
Re : Godronia cassandrae on a herbaceous plant?
Lijkt mij eerder Karstenia macer!
grtjs
Marcel
François Bartholomeeusen,
29-05-2018 15:43
Re : Godronia cassandrae on a herbaceous plant?
Hoi Marcel,
Wat een reactievermogen .... dat is werkelijk een "Zotto'tje"! Hartelijk dank voor je supersnel antwoord, dat had ik nooit gevonden. Weeral een nieuwe soort om te bestuderen!
Groetjes,
François
Wat een reactievermogen .... dat is werkelijk een "Zotto'tje"! Hartelijk dank voor je supersnel antwoord, dat had ik nooit gevonden. Weeral een nieuwe soort om te bestuderen!
Groetjes,
François
Hans-Otto Baral,
29-05-2018 15:43
Re : Godronia cassandrae on a herbaceous plant?
Yes, or Karstenia idaei. If you pretreat with KOH, the entire hymenium will turn blue in MLZ.
François Bartholomeeusen,
29-05-2018 17:54
Re : Godronia cassandrae on a herbaceous plant?
Congratulations, even the photo finish can't indicate the fastest!
Even in my binocular I see the blue coloration in KOH after the addition of Melzer.
Even in my binocular I see the blue coloration in KOH after the addition of Melzer.
Marcel and Zotto, thank you!
Greetings,
François