yellow blossoms of dyer´s woad, a plant for dyeing blue/blooming woad/blue staining plant

archaeophyte asp beauty biannual blooms botanical botany brassicaceae cockayne color country detail dyer europe european flora florescence flower flowers garden glastum green herbal indigo indigotica inflorescence isatis jerusalem leaves meadow medical natural nature outdoor perennial petals plant rural season side sky species spring staining summer tinctoria vegetation wild wildflowers wildlife woad yellow