The Secret World of Lichens: A Young Naturalist's Guide

Lichens are complex life forms that are the result of a symbiotic partnership between multiple organisms, usually a fungus and an alga or cyanobacteria. Though often overlooked or mistaken for other organisms like moss, lichens are a critical part of each ecosystem they inhabit and are important sources of food, absorbers of carbon dioxide and biomonitors that help scientists detect air pollutants, among their many other functions.

The Secret World of Lichens is a beginner naturalist's gui...