Here’s a picture of lungwort up close, taken near the North Santiam River in Oregon.
Also known as Lung lichen, this lichen has been used in dyes, teas, and for treatment of lung ailments. Deer and moose browse on lungwort and other animals use it for nest material.
Lungwort is sensitive to air pollution and doesn’t grow well in polluted locations. In fact, the National Forest Service keeps a database on this and other lichens “to detect, map, evaluate trends, and assess the ecological impacts of air pollutants.”