“Rippled Ring Lichen”: {A. separata}

 Arctoparmelia separata (aka “Xanthoparmelia separata” or “Rippled Ring Lichen”)

Location Summary

Range: Arctic & boreal south to northern British Columbia & Sask

Identification Characteristics

Description: Lower surface gray to black or purplish black.

Lookalikes: Very similar to the much commoner Arctoparmelia Centrifuga, but the lower surface is a dull mouse-gray, at least in the center of the thallus & sometimes out to the edge. (The more appressed the thallus, the darker the undersurface).  It tends to be thicker & stiffer than Arctoparmelia centrifuga.

Bibliography: Macrolichens of the Pacific Northwest, by Bruce McCune & Linda GeiserLichens of North America, by Brodo, Sharnoff, & Sharnoff


Database Entry:  Distance Everheart 12-26-13

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