A range of lichen greens--not yellow enough to be olive, not blue enough to be pine or viridian green…

Lichens

Nature News: Why lichens appear green when it rains

Common Greenshield Lichen (Lichens of Bouverie Preserve) · iNaturalist

Lichen Biology

Frontiers The Lichens' Microbiota, Still a Mystery?

Just How Green Was my Valley?

Time to get enLichened

Lichen Biology

Lichen Biology

What is a lichen?

Lichens: Tough and Sensitive

Two's Company, Three's a Lichen? - The New York Times

Dark Lichen - MIX N' MATCH Colour Collection by Laurentide Paint