Rock Tripe on Vigue Trail near Deering Pond Photos: Kevin McKeon Lettuce-like Rock Tripe is Edible, Barely By Kevin McKeon, director, Mousam Way Land Trust The trails around Deering Pond hold many interesting plants. One, seen covering many large, old rocks and outcrops of granite, is a type of lichen called rock tripe. Part of its botanical name comes from the Latin umbilicus, meaning navel. This is where another common name, navel lichen, comes from and describes how these lichens…