art background curves design floral flourish flower graphics leaf nature plant spiral spring summer swirl tree vector biology botany cell cross section Jasmine magnification microscope Oleaceae section Asplenium trichomanes fern Filicopsida Great Britain Maidenhair Spleenwort natural non-flowering old rock Terrestrial plant wales wall welsh color colour compositae ecology flora flowers Greece Greek green pink plants salsify white wild "Nature after rain delicacy garden lilac macro macro photography purple rain shape water" border England english lavatera pale perennial petals ribbed shrub primrose Primula vulgaris Sussex yellow mediterranean olive papaver poppies poppy red roadside Leguminosae light mauve pea sunlight Vicia