Tag Archives: lichen

Lichens, Camp Meeker, Calif.

These lichens were growing on reddish soil exposed by a road cut, in the redwood forest above Camp Meeker, California. The lichens in both photos are approximately the same size; in the first photo, the edge of a nickel appears at lower left to provide a sense of scale.

As to identification, these lichens are in the genus Cladonia: the primary thallus consists of whitish-green squamules (the little leaf-like things at the bottom of the organism); and arising from the squamules is the podetium, an upright structure characteristic of the genus Cladonia. But to determine which species of Cladonia, I would have had to collect some samples and carefully examined them. In Lichens of California, Mason E. Hale Jr. and Mariette Cole state that “Cladonia is one of the first lichens collected by amateurs; since I am a rank amateur when it comes to lichens, it is thus no surprise that I paid so much attention to these showy and fascinating lichens.