By A Mystery Man Writer
Lichen Biology
Lichen - Wikipedia
Mixing Realistic Natural Green in Watercolour - Lee Angold
Lichen: Not technically a plant, Outside
Nature News: Why lichens appear green when it rains
Lichens
Focus on nature: What's not to like about lichens?, Free
What is a lichen?
Lichen
Lichen
Mixing Realistic Natural Green in Watercolour - Lee Angold
Guide to Britain's lichens: what they are, where to find them and
Lichens
Ctein's Online Gallery - Newer Work