Cetraria Islandica

Iceland moss is actually a lichen; its "moss" nomenclature most likely resulted from its appearance, which presents common aspects of other mosses (ascending, erect foliation).

Coloration ranges from a lively green to a greyish, almost snowlike white. And although it grows abundantly in the western and northern plains of Iceland, it can be found in various (mountainous/northern) regions of Wales, Scotland, Alaska, Colorado, and New England.