boundary edge England english farm field Great Britain landscape margin Soil spring Sussex tilth woodland church flowers garden magnolia natural nature shrub tree wall background bark Castanea chestnut cracked fissure hard rough rugged shadow sunlight texture flood meadow overflow reflection trees water winter flower plant South Downs valerian Valeriana officinalis white wild anemones bank roadside sward verge Ajuga reptans blue bugle grass compositae ragwort Senecio jacobaea summer yellow cream Filipendula ulmaria meadowsweet Aesculus hippocastanum blossom horse chestnut pyramid spike stamens