Weed Alert! Dyer’s woad
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Dyer’s woad
Description 1-4 ft. tall annual or short-lived perennial
with small bright yellow flowers
Flowers clustered at end of branch tips have four petals about 1/8 in. long
Hanging blue-black fruits are 1-4 in. long
Low-growing arrowhead-shaped leaves form a round cluster
Leaves on stem are lance-shaped alternate bluish-green and covered with a powdery white film
Reproduces by seed
Spread by roads, trails, equipment, hay, forage, seed
Native to Europe and Asia
Bloom Period Apr - Jul
Habitat Scrub, grassland, forest
(Isatis tinctoria)
Image credits: Front and back: J.M. DiTomaso ©2007 The Regents of the University of California; icons by Tim Hyland These cards were adapted from a design by National Park Service.
2-Minute Removal Pull
Mature Size Knee