What could possibly be inspiring about that green stuff covering Oregon’s trees? What could possibly be inspiring about that green stuff covering Oregon’s trees? Lichen is a an ecological ...

Lichens are not harmful to plants, but there may be times when it makes sense to remove them. Here's how to spot them.

For instance, what are those green masses growing on your trees? Those growths could be either lichens, moss or algae, and the good news is that none are cause for alarm.

Lichen is not a plant, but a symbiosis of two or three organisms that work together: fungi and blue-green algae (often ...

For instance, what are those green masses growing on your trees? Those growths could be either lichens, moss or algae, and the good news is that none are cause for alarm.

Moss and lichen may grow on solid, undisturbed surfaces, such as trees on your property. And though they aren't necessarily bad, you can remove them.

Truly, lichens rarely have anything to do with causing poor growth or death of shrubs and trees. Instead their appearance is often related to damage from environmental stress or poor management.