Lichens survive in a very wide range of habitats worldwide. Amazingly, more than 400 species can be found in Maryland.

Answer: That orange growth is lichen, not a rust pathogen. Lichen do not harm the tree or shrub in any way. They tend to grow only on that outer bark and stay there, not growing deeper into live ...

The lichen themselves will not cause decline, but they may be a good indicator of the overall health of your tree. An abundance lichen presence concentrated on damaged or dead wood, as your sample ...

Symptoms are usually the first clue that something is wrong. It can be a fever, a cough, fatigue or a number of other indicators in people, pets or livestock. The severity of the problem sometimes can ...

Q: I have a 27-year-old "Snowdrift" crabapple tree in the front of my home. It looks to have lichen on it - it looks like greenish-gray leaf-like spots all over the tree. I have been pruning it every ...

Algae, lichens and moss often form green or grey, powdery or mossy, crusty growths on the stems, branches and trunks of trees and shrubs. Pictured here, lichen and moss. This dreary "gray all day" ...

Those green-blue growths that you see on tree trunks and branches are not mosses. They are lichens. Lichens are not killing your tree, nor are they causing it to fail. They are telling you something ...

Now that deciduous trees are bare, trunks and branches have taken center stage, and you might be noticing nuances and irregularities that evaded your attention over the summer. For instance, what are ...

My tree has lost all its leaves and the bark now has some fungi growing on it? Is lichen killing my tree? Lichen (pronounced lie-ken) gets a bad rap based on its appearance alone. It has been on our ...

Now that deciduous trees are bare, trunks and branches have taken center stage, and you might be noticing nuances and irregularities that evaded your attention over the summer. For instance, what are ...

NACOGDOCHES, Texas (KTRE) - Often, I get the inquiry about that “green and grey fungus that is killing my tree.” At this time of the year when most leaves are off trees and shrubs, these growths are ...

There are thousands of species of lichens that grow in many different forms. Some are flat and crusty, some have leaflike ...