One thing all gardeners face at some point is unintentional plants growing in unintentional places. Moss, for example, often takes up residence in shaded, damp corners of your yard. The only problem?

Found on every continent, lichen is an extraordinary organism adapted to survive in every habitat except seawater. More than just curious growths on rocks and trees, lichen can endure extreme ...

Crustose lichens form crusty blooms on the surface of rocks and soil — even roof shingles, according to the forest service. Gordon, who organized the event, Lichen in a Winter World ...