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help with Aspicilia (my nemesis)

  • 18 Nov 2015 4:59 PM
    Message # 3646632

    Can’t seem to key this one. On basalt, Yakima Canyon, WA.

    center areolate (not seen in photo) to rimose becoming continuous towards zonate margin
    medulla - K-, I-
    apothecia - one to 4 or 5 / areole, ≤ 1mm diameter
    epihymenium brown
    hymenium hyaline, ≤200µm*
    hypothecium hyaline, ≤225µm*
    *section wasn't perpendicular
    spores - 8/ascus, ave ≈28x20µm
    paraphyses - submoniliform

    to photo gallery:
    1,2 habit
    3 ApoSxn
    4 Asci
    5 iodine

  • 19 Nov 2015 7:43 AM
    Reply # 3648664 on 3646632
    Bruce McCune (Administrator)

    One other character that would be helpful (almost necessary for this group) is the length of the spermatia (conidia). Bjorn Owe-Larsson et al's recent treatments depend heavily on this. Sometimes they are easy to find, sometimes not. In the latter case I put these in the Aspicilia sp. pile.


  • 20 Nov 2015 7:56 PM
    Reply # 3651964 on 3646632

    Thanks Bruce. Today tried to section possible pycnidia to no avail. (They were either small ascomata or else too underdeveloped to know what they might become.) I thought this was quite a attractive Aspicilia, but its some comfort to know that you have a pile of Aspicilia sp.

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