Tall. Med - Very Tall
Flower. The tiny yellow flowers grow in large clusters.
Leaves. The basal leaves are ovals with long stalks. The stem leaves are narrower and stalkless.
Habitat. Dry and rocky ground.
Practical. Woad was cultivated during the Middle Ages for indigotine, a blue dye that's produced by crushing the stems and leaves. Even earlier, the Greeks and Romans used woad for medicinal purposes.