Observation 27336: Punctelia rudecta (Ach.) Krog

When: 2009-10-25

Collection location: Beaver Co., Pennsylvania, USA [Click for map]

Who: Bob Zuberbuhler (Bob Z)

No specimen available

Help! I’m not even sure whether this is a mushroom or a lichen. It seems crustlike and was on a small dead branch. There are thin , whitish structures tha are often lobed. The magnified view shows tiny white spherules on the “caps” The center of the mass looks almost sandy. Any ideas?



Proposed Names

28% (3)
Recognized by sight: and now I pass the torch to the real lichenologists…
56% (1)
Recognized by sight: Definitely Punctelia. Looks isidiate, making it P. rudecta, but not quite enough resolution to be absolutely sure. Common (and handsome!) species and genus in Appalachia.

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Eye3 = Observer’s choice
Eyes3 = Current consensus


Add Comment
By: Jason Hollinger (jason)
2009-11-05 18:06:45 EST (-0500)

This genus is distinctive with bluish-grayish looks (esp. when damp like this), white marks (often slightly raised) all over the surface, and rounded lobes. Parmelia is similar but has squared-off, narrower lobes, and the marks are more net-like than dot-like.

Definately a lichen.
By: Daniel B. Wheeler (Tuberale)
2009-10-27 13:11:31 EDT (-0400)

Need to see the underside to tell more, but looks similar to Parmelia.

Created: 2009-10-25 14:33:45 EDT (-0400)
Last modified: 2009-10-25 14:33:45 EDT (-0400)
Viewed: 54 times, last viewed: 2017-06-06 05:33:03 EDT (-0400)
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