JOHN R. FOSTER / SCIENCE PHOTO LIBRARY JOHN R. FOSTER / SCIENCE PHOTO LIBRARY
Pixie Cup Lichens (Cladonia asahinae) growing on the north side of a chimney in Portland, OR. Lichens consist of alga and fungi that have formed a symbiotic relationship. Lichens along with mosses break down rock and other hard surfaces which helps other plant species to get established.
Model release not required. Property release not required.