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When: 2013-10-17

Collection location: Rooster Rock State Park, Multnomah Co., Oregon, USA [Click for map]

Who: Daniel B. Wheeler (Tuberale)

No specimen available

On tree. Color distinctive: light blue. Underside insteresting too. Many root-like mats holding onto bark. With bark peeled away, dull brown holdfasts cover the surface.


Surface of lichen light blue.
Subsurface in cross-section dark blue. Still holding onto bark.
With bark peeled away, many brown to red-brown rootlike structures, matted.

Proposed Names

29% (1)
Recognized by sight
57% (1)
Used references: Brodo, Lichens of North America. This was found on Bigleaf maple, at Rooster Rock S.P., which is just outside of its known area.

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= Observer’s choice
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