close-up vertical image of textured, lichen and moss-covered bark of birch tree.

abstract age aged aging background bark betula betulaceae biology birch birchen close closeup color colours cover covered detail detailed dry eco effect environmental front furniture grain graphic green grey grooved grow grown growth grunge hard image layer lichen material mature moss mossy ornament outer outside pattern patterned peel photo photography picture protect protection ragged relief rind rough silver skin stock structure structured textural texture textured timber tree vertical weathered wood wooden woody yellow yellowish