Northwest Lichenologists

brown crustose

  • 20 Mar 2015 12:53 PM
    Message # 3259969

    Hi all, can anyone tell the genus of this little brown lichen? The picture of the blueish green apothecia goes with this lichen. The only spore I found is hyaline, around 13x8 microns.

  • 20 Mar 2015 12:56 PM
    Reply # 3259973 on 3259969

    This is the brown crustose lichen, sorry for the mix up.

  • 22 Mar 2015 3:27 PM
    Reply # 3261591 on 3259969
    Bruce McCune (Administrator)

    Steve, that is a species in the Lecidea atrobrunnea or L. fuscoatra groups. There are several possibilities but TLC is needed to know for sure which one you have. Lacking TLC I would suggest testing the medulla with IKI. If negative, then probably L. fuscoatra group. If I+ violet then Lecidea atrobrunnea. Each group has multiple species in our area.


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