Dyer's Woad
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Dyer's Woad
Brassicaeae (Mustard Family)
Class A Weed
Description:Dyer's Woad; a winter annual, biennial, or short-lived simple perennial; spreads
only by seed. It reaches 1 to 4 feet tall. Basal leaves
have long petioles and arise from a thick taproot, which penetrates to a
depth exceeding 5 feet. The lance shaped stems are alternate, clasp the stem,
and are shorter than the lower leaves. All leaves have a characteristic
whitish midvein on the top of the plant in clusters. Fruits are teardrop-shaped, purplish brown
at maturity, and contain a single seed.
Origin: Europe; first recognized in the U.S. during colonial times
Key Characteristics:
- Thick taproot
- Whitish midvein on the leaf surface
- Teardrop-shaped fruiting structure
Distribution:Only one known population has been identified in the state. This plant
is a serious problem in most states to the north and west of New Mexico. Due to its
competitive ability, if dyer's woad becomes established, it can easily
displace desirable vegitation.
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