England english forest fresh Great Britain green leaf leaves light natural nature oxfordshire spring track trail trees wood woodland blackthorn branch bush flowers petals Prunus shrub stamens Sussex tree white wild blossom cherry countryside flower landscape rural Cardamine pratensis Cruciferae Lady's smock mauve plant Asparagaceae blue coastal Cornish cornwall flora Scilla verna squill field hill meadow panorama scene slope South Downs view grass grassyard lawn London park path relax tourists walker walkers brazil clouds orange Rio de Janeiro Santa Teresa sky alone isolated lone single stark articulation bird white cob house joint mere pond swan swim water wave