No.

Common lichens in Oregon. Are these in your yard?

Wolf Lichen

Wolf Lichen (Letharia vulpina). Photo by Barbara L. Wilson.

Tree Lungwort

Tree Lungwort (Lobaria pulmonaria). Photo by Holly Merker.

Oakmoss

Oakmoss (Evernia prunastri). Photo by Barbara L. Wilson.

Shield Lichen

Shield Lichen (Parmelia sulcata). Photo by Jeffrey Lee.