Page author: David Giblin
Euclidium syriacum
euclidium, Syrian mustard

Distribution: In scattered locations east of the Cascades crest in Washington; Washington south to California, east to Idaho, Wyoming, Utah, and Colorado; also in Massachusetts.

Habitat: Weed of roadsides and ditch banks.

Flowers: May-June

Origin: Introduced from Eurasia

Conservation Status: Not of concern


Freely-branched annual, strongly pubescent with forked hairs, the stem 1-4 dm. tall.


Leaves all cauline, alternate, short-petiolate, oblong-oblanceolate, 2-5 cm. long, remotely dentate.


Flowers sub-sessile in open, spike-like racemes; pedicles stout, 1 mm. long; sepals 4, not saccate; petals 4, white, spatulate, 1 mm. long, rounded or very shallowly notched; stamens 6; style stout, beaklike, nearly as long as the silicle.


Silicles obovoid, 2-3 mm. long, covered with pungent hairs.

Accepted Name:
Euclidium syriacum (L.) W.T. Aiton
Publication: Hortus Kew. 4: 74. 1812. 1812.

Synonyms & Misapplications:
Anastatica syriaca L.
Bunias syriaca (L.) M. Bieb.
Additional Resources:

PNW Herbaria: Specimen records of Euclidium syriacum in the Consortium of Pacific Northwest Herbaria database.

WA Flora Checklist: Euclidium syriacum checklist entry.

E-Flora BC: Euclidium syriacum atlas page.

CalPhotos: Euclidium syriacum photos.

USDA Plants: Euclidium syriacum information.

17 photographs:
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