background bare blue branches crown grasp hand lonely naked one prune pruned single sky top tree treetop trim trimmed trunk abstract bark brown etched forest garden gardening nature palmtree pattern patterns rough skin texture trees tropical wood angles appearance blades fronds palm pandan pandanus plant screw pine spiraling spiralling stem textures twisted twisting variety avenue England english Great Britain Hampshire high lane line road row series shadow sunlight tall trunks winter branch Natural landscape pollard Salix Surrey twig vegetation willow beech Fagus fresh green leaf leaves natural spring woodland algorithm algorithms brain brains colourful Fractal fractals groe grow growth math mathematics sundfractals symbol symmetric copse oak old Quercus spinney Sussex windbreak Claremont cloud lakeside landscape national trust water