There are thousands of species of lichens that grow in many different forms. Some are flat and crusty, some have leaflike ...
Lichens survive in a very wide range of habitats worldwide. Amazingly, more than 400 species can be found in Maryland.
When we see strange-looking growths on our trees, our first instinct is to panic. Is there something wrong? Is it a disease?
Over the course of many years working with trees, hundreds of people have asked me about “that stuff” growing on the bark, or hanging from the branches of trees. What is it? Is it a disease? Is it ...
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