England english flowers garden Great Britain irises mauve petals purple spring violet background ferns green natural nature plants Sussex texture clematis climber joy wall white arbour bench seat shade shady vine fuel logs pile renewable wood flowering plant Greater Butterfly orchid Herbaceous plant orchidaceae plant Platanthera chlorantha Surrey Terrestrial plant arch architecture curve futuristic light London modern shadow cumbria rural stream trees view water border flower Gloucestershire path tree amaranthaceae Amaranthus autumn fall red