Tsibirin Cetraria wani nau'in lichen ne wanda aka fi sani da gansa Iceland. Yana da nau'in naman gwari na lichenized a cikin dangin Parmeliaceae, kuma an rarraba shi a ko'ina cikin Arewacin Hemisphere, ciki har da Iceland, inda ita ce shuka ta ƙasa. Ma'anar ƙamus na tsibirin Cetraria zai zama "lichen tare da launin toka-kore, reshe, da foliose thallus, wanda aka yi amfani da shi ta magani azaman mai tsinkaya da lalata".