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Lichenicolous on Cladonia foliacea

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  • April 14, 2023 at 4:59 pm #32597
    JennyS

      I know a definite answer isn’t possible without microscopy (and I don’t have specimens) but might the first lichenicolous fungus on Cladonia foliacea from Studland Heath, Dorset be Abrothallus cladoniae?

      w Q Abrothallus 1306130048.jpg

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      w Q Abrothallus 1306130050b.jpg

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      Also on Cladonia foliacea from Studland Heath – another lichenicolous fungus?

      w Q on Cladonia foliacea 1306260120 Clad foliacea.jpg

      [attachment=1]w Q on Cladonia foliacea 1306260120 Clad foliacea.jpg[/attachment]

      w Q on Cladonia foliacea 1306260121 Cladonia foliacea.jpg

      [attachment=0]w Q on Cladonia foliacea 1306260121 Cladonia foliacea.jpg[/attachment]

      April 15, 2023 at 7:02 pm #45405
      John Norton

        Jenny,

        No idea about your first one but I thought the little black tufts on C. foliacea were just rhizines. They seem to arise on the margins of the basal squamules.

        John Norton

        April 15, 2023 at 10:24 pm #45406
        JennyS

          Thanks John. The person I was with had suggested possibly lichenicolous but looking at the description of C, foliacea in LGB&I 2 it does mention lower surface with “occasional tufts of black, marginal hairs” which I’d never noticed before but which would explain these

          April 16, 2023 at 8:12 am #45407
          JonasRavn

            The cilia/rhizines look fine for C. foliacea and I suspect that the pycnidia actually belong to the “host” as well. They can be quite numerous on the squamules of some specimens.

            April 16, 2023 at 8:08 pm #45408
            JennyS

              Thank you – I’d thought (over-optimistically) that perhaps they were too big for pycnidia

              April 17, 2023 at 6:50 pm #45409
              JonasRavn

                I might be wrong – determining wether something is a lichenicolous fungus or the pycnidia of the “host” is a constant struggle for me. I have spent more time than I care to admit on lichenicolous fungi that turned out to be nothing more than host pycnidia :) That being said, the pycnidia of some Cladonia spp. can grow quite large and urn-like and to me the size of the pycnidia of your specimen looks more or less right. But they are more numerous and pale than I am used to, so I am not entirely sure something else is not at play.

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