Tag Archives: Boreal Oakmoss

Boreal Oakmoss (Evernia mesomorpha)

Boreal Oakmoss
Photo by Luciearl

Boreal Oakmoss (Evernia mesomorpha) is a common and widespread shrubby lichen. It occurs across the globe in the northern latitudes. In the United States it is restricted to the northern tier of states. In Minnesota it is common in the northern third of the state, very common in the Arrowhead region, with only scattered occurrences south to the Metro region. It is found in sunny sites in forests and woodlands. It grows on the branches of both deciduous and coniferous trees. It is relatively tolerant of pollution, which allows it to survive near urban areas.

The vegetative body is shrub-like. It consists of numerous, loosely hanging, evenly forked branches. It looks something like an antler lichen but has broader branches. The branches are soft when wet, and pliable, not brittle, when dry. The upper and lower surfaces are green, wrinkled, and usually have abundant, coarse, granules. These granules are the main form vegetative reproduction. Sexual reproductive structures are rarely produced.

Boreal Oakmoss is not edible. Handling it may cause severe dermatitis.