Lavender flowers blue flowers purple dunkellia violet lavender lavender field lavender cultivation agriculture wild plant wildblume true lavender narrow leaf lavender inflorescence lavandula angustifolia lavandula officinalis lavandula vera lamiaceae crop scented plant medicinal plant fragrant cottage garden bed homeopathy summer flowers garden flowers plant nature summer garden flora botany decorative herbs meadow flower meadow lavender meadow lavendula herb french provence petals aromatic aroma fragrance green