General Description: Dyers woad grows as a winter annual, biennial or short-lived perennial, ranging from 1 to 4 feet tall, from a 3 to 5 foot long taproot. The basal rosette produces stalked, bluish green leaves covered with a fine hair.
Flower Description: The flowers are small and yellow, cross-shaped with 4 sepals, 4 petals and 6 stamens. The yellow petals are about 1/8 inch wide and just over 1/8 inch long. Flowers are found in terminal clusters on the branch tips.
Leaf Description: It has basal leaves, leaves in a radiating cluster at the stem base, and stem leaves. Basal leaves are stalked, bluish green and are up to 7 inches long. Stem leaves are lance shaped, alternate and not stalked. All leaves have a cream-colored mid vein.
Stem Description: Stems are branched toward their tips.
Fruit/Seed Description: The fruit is a flattened seed pod (silicle), 3/8” long and 1/4” wide, winged and slightly pear shaped and it hangs from a small stalk. Initially the pod is hairless and green, but it matures to a black or dark purplish brown. Each pod produces 1 seed.
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