Species

Parmelia sulcata (Shield lichen)

Parmelia sulcata. Photo: (c) mister_bumble, some rights reserved (CC BY)

iNaturalist • Wikipedia

Net-marked parmelia (Parmelia sulcata), or shield lichen, is a foliose lichen in the family Parmeliaceae. It is very tolerant of pollution and has a cosmopolitan distribution, making it one of the most common lichens. It harbours a unicellular Trebouxia green algal symbiont.

— Wikipedia

Sightings

Where in Humboldt

Discussion

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