Weed Alert! Dyer’s woad

www.cal-ipc.org

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