Northwest Lichenologists

Brown discs on Evernia?

  • 21 Nov 2022 11:07 PM
    Message # 12998135

    Hi all!

    I was looking at an Evernia prunastri at my house in Bellevue WA and noticed some brown discs on it, not more than maybe 0.75mm across. There's numerous whitish strands (hyphae?) around the discs onto the underlying lichen. Maybe a lichenicolous fungi? Or something else? Does anyone know if there's any chance of identifying what these are? (Preferably without a compound scope, if possible!) I checked some online resources for lichenicolous fungi on Evernia and didn't see anything that looked right. I'm not familiar at all with lichenicolous fungi, though.

    One of the discs (seen in the 3rd and 4th pictures) looks kinda messed up-- might not be the same as the discs or might be damaged version.

    4 files
  • 23 Nov 2022 1:21 PM
    Reply # 13000230 on 12998135
    Bruce McCune (Administrator)

    Interesting. I would guess that this is a parasite. Apothecia on Evernia should have a thalline margin. There is a beautiful species in far east Russia in which you can see these. If you scroll down a ways on this page you will see it.

    Perhaps Mike Haldeman could help you with the parasite.

  • 23 Nov 2022 11:08 PM
    Reply # 13000627 on 12998135

    Thanks Bruce! That fertile Evernia species is definitely beautiful.

    I'll reach out to Mike Haldeman about it and report back if he has any insights.

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