veronica teucrium flowers on the field in summertime. bright purple spiked flowering speedwell plants

veronica teucrium flowers field summertime bright purple spiked flowering speedwell plants lilac flower medicinal plant inflorescence wild longifolia macro freshness season agricultural grow garden treatment dark blue blossoming fragility beauty foliage romantic petal alternative medicine violet medical group vibrant delicate elegant nature green leaf spikes decorative floral wildflower vertical meadow bud german cure format