Jennifer Murphy's photos with the keyword: moss or lichen

wisegeek.com ~ "Physically, lichens and mosses can be difficult to distinguish. In general, mosses grow in moist dark areas and have small leaf-like structures, in addition to stems. Lichens often appear grey or pale white in appearance, while moss is usually green. Many lichens also create disc shaped fruiting bodies, which cannot be seen on mosses." www.wisegeek.com/what-is-the-difference-between-lichen-an...

wisegeek.com ~ "Physically, lichens and mosses can be difficult to distinguish. In general, mosses grow in moist dark areas and have small leaf-like structures, in addition to stems. Lichens often appear grey or pale white in appearance, while moss is usually green. Many lichens also create disc shaped fruiting bodies, which cannot be seen on mosses." www.wisegeek.com/what-is-the-difference-between-lichen-an...