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Notes:
foliose lichen, on bright exposed dogwood bark along canal (Piscidia piscipula)
THALLUS: light greenish gray, not spotted, lobes confluent w/ fan-shaped tips, flat to v subtly convex and wrinkled, closely appressed, to 1.5 mm wide, black and smooth below (no rhizines), no soredia
MEDULLA: white
APOTHECIA: abundant, 0.8 mm wide, lecanorine, black w/ striking purple pruina, raised smooth whitened rim

Check out that pruina! Not something you see every day…

Species Lists

Images

darker one on the right is Physcia neogaea, lighter more closely-appressed one on left is Dirinaria purpurascens
close-up of pruina on apothecia, at 30x

Proposed Names

87% (1)
Recognized by sight: purple pruina!!

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= Observer’s choice
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