Colors of lichens are very important for their identification, but beginners often struggle with color terms as applied by lichenologists in descriptions and keys. For example, usnic acid gives a distinctive yellowish tinge to lichens, which is recognized by all lichenologists, but initially that yellow tinge can be hard to discern in comparison to the wide range in subtle tones displayed by lichens. The purposes of this posters are first, to help beginners learn to see colors the way that lichenologists see and refer to them, and second, to provide an attractive and interesting visual display of the spectrum of colors seen in lichens. Each color term is illustrated with five examples from lichens of the Pacific Northwest of North America.

10 x 29 inch (25.4 x 73.7 cm) poster on heavy white paper, folded in panels to 10 x 7.25 inches.

Mailed flat and folded.

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