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 wonder that ...

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Lichens were already widespread more than 410 million years ago, according to a new international study that identifies a ...

Manzitto-Tripp is an associate professor at the University of Colorado Boulder in the Department of Ecology and Evolutionary Biology. She’s also the curator of botany at the school’s Museum of Natural ...

Learn about oral lichen planus, its causes, symptoms, treatment options, and prevention tips to manage this chronic but ...

Lichen planus is more of a chronic discomfort than a serious health concern. However, people with the oral form have a slightly higher risk of developing oral cancer. Lichen planus is a group of ...

An oak tree in my yard has a large growth on it. It doesn’t seem to be hurting the tree, but should I be concerned? — B.I. It sounds like you are describing what is known as a burl. Burls are round or ...