Lichens | Ohioline
Nature Moments: Lichen Partnerships - Maine Audubon
Two's Company, Three's a Lichen? - The New York Times
Fairy barf, British soldiers and other odd lichen you can find in the Maine woods
Wetland Plant Series: Lichens - Phinizy Center for Water Sciences
Garden Q&A: Lichens are more noticeable in winter, but aren't plant killers
 "The lowdown on lichens | Forest Preserve District of Will County")
The lowdown on lichens | Forest Preserve District of Will County
Moss or Lichen? - The Great Bay National Estuarine Research Reserve (GBNERR)
What are lichens? An expert guide to common UK lichens - Gardens Illustrated
Should You Worry About Lichen Growth On Your Trees?
ring lichen - Encyclopedia of Life
Lichen, Algae, and Moss on Trees | University of Maryland Extension
Lichen - Wikipedia
Moss and Lichen: Wait, what's the difference? - Canadian Museum of Nature
Lichen: Cute and fuzzy, but also a serious problem | Bladen Journal
Lichens: More Complex Than Anyone Imagined - Laidback Gardener
Lichens and People: Uses, Benefits, and Potential Dangers - Owlcation
Tree-Dwelling Lichen - For The Love Of Trees, LLC : For The Love Of Trees, LLC
Unusual lichen do not damage plant hosts | Mississippi State University Extension Service
Lichen Habitat
TALKING GARDENING with DOUG - Lichen - The Great Big Greenhouse Gardening Blog
Mysterious life of lichen – Marin Independent Journal
About Lichens
