Observation 11638: Dirinaria purpurascens (Vainio) B. Moore

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


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)
Eye3 Eyes3
Recognized by sight: purple pruina!!

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Eye3 = Observer’s choice
Eyes3 = Current consensus


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Created: 2008-09-27 18:24:02 CDT (-0400)
Last modified: 2008-09-27 18:24:02 CDT (-0400)
Viewed: 95 times, last viewed: 2018-04-12 01:24:56 CDT (-0400)