Northwest Lichenologists

Identification second opinion

  • 10 Nov 2022 11:55 PM
    Message # 12985622

    Hello all. I'm a taking Dr. Lalita Calabria's Fungal Kingdom class at Evergreen.  I found this lichen on the ground on campus, and we keyed it out to Hypotrachyna revoluta. However, it tested C- when the guides Lalita and I were using said it should test positive. It would be awesome to get some second opinions on the ID!


    Size of thallus piece found: 5.5 cm


    Found on a trail by 2712 Lewis Rd NW, Olympia, WA 98505

    Overstory included Acer macrophyllum and Pseudotsuga menziesii ; may be irrelevant due to unknown growing location.

    Substrate unclear, though I think the stick it is attached to is from a softwood tree.


    Other chem tests:

    P- (Medulla)

    K- (Medulla)

    K+Y (Cortex)


    Lat: 47.068999

    Lon: -122.984569

    Elevation: 85.726005 meters


    Thank you!

    -Cas Setterberg

    7 files
  • 11 Nov 2022 7:47 AM
    Reply # 12985996 on 12985622
    Bruce McCune (Administrator)

    Looks like a Parmotrema, perhaps P. arnoldii based on your spot tests.

  • 13 Nov 2022 4:44 PM
    Reply # 12987877 on 12985622

    Okay, that was our other guess; thank you for replying! :)

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