Northwest Lichenologists


  • 18 May 2017 4:07 PM
    Message # 4840933

    OK, so I found the lichen in the photo gallery labeled Moon Res. near Moon Reservoir between Riley and Burns Oregon. The keys lead me to Lecanora zosterae however the spores are not the size for zosterae. Spores are 15.3-17.35 X 7.68-10.25ยต. The lichen is on dead bunchgrass. Apos are K- and C-. Any ideas out there?



    Last modified: 18 May 2017 4:09 PM | Steve Sheehy
  • 19 May 2017 8:44 AM
    Reply # 4842162 on 4840933

    It looks like L. flowersiana, at least superficially. I don't know if the spore size is correct off the top of my head. Do you have the soil crust book? Check those species out. Is this one on rock or soil? Also use the polarized light trick - that helps a lot on some of those little Lecanoras.

    Last modified: 19 May 2017 8:45 AM | daphne stone
  • 19 May 2017 6:28 PM
    Reply # 4842958 on 4840933

    Hi Daph,

    I did the POL test (I use two pairs of polarized sun glasses) and it was negative. The spores of L. flowersiana are 10-14(18) X (4)4.5-6(7). L. zosterae are 9-13.5 X 5-6, according to  Biotic Soil Crust Lichens of the Columbia Basin. My spores are 10.24-17.35 X 7.68-15.36. It's on dead bunchgrass over desert soil (mostly detritus).

    I also thought about Caloplaca but that doesn't key out either.

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