Boraginaceae botany Cynoglossum officinale downland England english field flowers Great Britain green Hound's tongue meadow natural nature South Downs summer Sussex wild cloud dusk evening glorious glory landscape light rays shafts silhouette sky sun sunset countryside farm flora flower grass hill pastoral ridge rural view wayside clematis climber cream Old Man's Beard plant traveller's joy white background Brassica napus canola crop fields harvest national park plants rapeseed seedheads chalk path track trail travel umbellifers verge bush cold February hedge slope snow snowy tree winter architecture Chattri dais dome Indian landmark marble memorial military monument pillars plinth remembrance stone war World