Publication: Sp. Pl. 2: 670. 1753.
Origin: Introduced from Eurasia
Herbarium search: CPNWH
Notes: This species has neither been collected nor photographed in Washington. It is not considered established here. FNA7: "Isatis tinctoria has been cultivated since ancient times as a source of a blue dye (woad) obtained by fermenting the ground leaves and proximal portions of the plant."
Last updated 3/27/2022 by David Giblin.