bark Castanea chestnut cracked England english fissured Great Britain natural nature old rough Sussex texture tree trunk wild Atmospheric phenomenon blue branch freezing landscape Morning Natural landscape scene snow twig winter erosion exposed ground grow growing leaves network nutrients radiating root Roots Soil Stump tangled woodland abstract backgrounds bare brown bumps close-up colors colours contrast cracks dark dry edge edges gnarled gray grey grooves layers light lined lines mottled patterns perspectives ridges shade shades-of-colour shadows shapes strips sunlight surface surfaces textured textures tree-trunk uneven wallpaper wood wrinkled wrinkles wrinkly field green oak Quercus rural South Downs summer forest glade refreshing February heathland Quercus petraea sessile oak Surrey art artwork dead-wood grain hard-wood lumber painted painting patterned shape shaped surfaced timber twisted variations varieties wood-grain