Northwest Lichenologists

Marine Driftwood Lichens

  • 01 Apr 2021 4:32 PM
    Message # 10262012

    Hello! Encountered some new to me marine lichens growing on a large driftwood log in Olympia, WA today. The green thallus one with dark red apothecia I’m guessing is Lecanora xylophila however I’m stumped on the black one, thought perhaps Verrucaria sp. except substrate for that genus is limited to rock. Any insights would be greatly appreciated, thank you!

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  • 02 Apr 2021 7:28 AM
    Reply # 10264854 on 10262012

    Some years ago on Squaxin Island, I found something on driftwood that looks very much like the one you thought may be Verrucaria.  It turned out to be something conidial.

  • 02 Apr 2021 8:12 AM
    Reply # 10265153 on 10262012

    Thanks for the info Scot! Going to collect a sample of it for further examination, unexpected encounter while walking dog at a park very close to my house, didn’t even have my hand lens.

  • 05 Apr 2021 11:55 AM
    Reply # 10275705 on 10262012

    It could be Nemania maritima. The website Pyrenomycetes from southwestern France has some information on this species. It was recently reported from marine driftwood on the San Juans - Evansia 37(3) page 76 (although it's not a lichen.)

    Nice find!

  • 10 Apr 2021 3:06 PM
    Reply # 10296068 on 10262012

    Mike Halderman thank you so much! Looks like a very promising lead. I’ll follow up eventually with more details.

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