Page author: David Giblin
Erucastrum gallicum
dog mustard, hairy rocket

Distribution: Occurring in scattered locations on both sides of the Cascades crest in Washington; British Columbia to California, east across most of North America to the Atlantic Coast.

Habitat: Fields, roadsides, wastelots, and other disturbed areas.

Flowers: May-July

Origin: Introduced from Eurasia

Growth Duration: Annual, Biennial

Conservation Status: Not of concern

Pollination: Bees, flies, butterflies


Annual with soft hairs retrorsely aligned and appressed, the stems simple to freely branched, 1.5-8 dm. tall.


Leaves alternate, 3-20 cm. long, pinnatifid, the segments often again wavy lobed.


Flowers in a loose, elongate, bracteate raceme, the lowermost flowers sometimes in the axils of scarcely modified leaves; pedicles slender, ascending, under 1 cm. long; sepals 4, slightly saccate at the base; petals 4, pale yellow, 4-7 mm. long; stamens 6; style 1.5-3 mm. long.


Siliques 2-4.5 cm. long and 1.5 mm. thick, terete-quadrangular, the valves prominently keeled; seeds in 1 series.

Accepted Name:
Erucastrum gallicum (Willd.) O.E. Schulz
Publication: Bot. Jahrb. Syst. 54(Beibl. 119): 56. 1916.

Synonyms & Misapplications:
Erucastrum pollichii Schimp. & Spenner
Sisymbrium gallicum Willd.
Additional Resources:

PNW Herbaria: Specimen records of Erucastrum gallicum in the Consortium of Pacific Northwest Herbaria database

WA Flora Checklist: Erucastrum gallicum checklist entry

OregonFlora: Erucastrum gallicum information

E-Flora BC: Erucastrum gallicum atlas page

CalPhotos: Erucastrum gallicum photos

11 photographs:
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