banks Bedfordshire course England english flow fresh great Great Britain green natural nature Ouse oxygenate oxygenation reflections river trees water waterweed weir crataegus dew green.grass hawthorn landscape pond pool shrub sky South Downs Sussex tree viewcloud abundant.abundance buttercup field flowers many meadow profusion ranunculus rich spring wild yellow distance distant farm fields forest grass hills view canada conifer entrance evergreen falls fierce gorge mountain opening peak power range rock Rockies rocky wood big blade cultivar cyprus dwarf fan garden jagged large leaf leaves mediterranean palm plant pointed sharp spreading cloud group oak parkland Quercus shade summer three trio wiltshire autumn beautiful beauty countryside quality rural Symonds Yat woodland wye cumbria fell hill Lake district picturesque pretty