boundary branches England english field Great Britain green line meadow natural nature row series spring Sussex tree trees blue bluebells flowers fresh Hyacinthoides wild wood woodland carpet Hyacinthoides non-scriptum ash background Fraxinus leaf leaves texture countryside gorse habitat heath heather heathland ling Ulex yellow bulb flower garden head Leucojum pendant pendulant petals spring snowflake white winter clearing margin Stellaria stichwort coast Cornish cornwall cowslips flora May Primula veris cereal crop farm grow healthy landscape track wheat