Blooms: April-August
Habit: herb
Duration: annual
Origin: Introduced from Europe
Distribution: Distributed widely throughout Washington; widely introduced throughout North America.
Habitat: Weed of waste ground, low to moderate elevations.
Habit: herb
Duration: annual
Origin: Introduced from Europe
Distribution: Distributed widely throughout Washington; widely introduced throughout North America.
Habitat: Weed of waste ground, low to moderate elevations.
Species Description:
General: Glabrous annual, the stem simple to freely-branched, 1-5 dm. tall.
Leaves: Basal leaves few, 2-6 cm. long, scalloped to almost lyrate, narrowed to a short petiole; lower cauline leaves similar to the basal, but gradually changing upward, ultimately sessile, auriculate, lanceolate to oblanceolate, and dentate to wavy-lobed.
Flowers: Inflorescence a large, terminal, bractless raceme; pedicles slender, spreading to up-curved, 7-15 mm. long; sepals 4, erect,1.5-2.2 mm. long; petals 4, white, 3-4 mm. long; stamens 6; style nearly lacking.
Fruits: Silicles strongly obcompressed, oval to oblong-obcordate, narrowly notched, 10-17 mm. long, wing-margined all around, the sinus 1.5-2.5 mm. deep; seeds in 1 series.
General: Glabrous annual, the stem simple to freely-branched, 1-5 dm. tall.
Leaves: Basal leaves few, 2-6 cm. long, scalloped to almost lyrate, narrowed to a short petiole; lower cauline leaves similar to the basal, but gradually changing upward, ultimately sessile, auriculate, lanceolate to oblanceolate, and dentate to wavy-lobed.
Flowers: Inflorescence a large, terminal, bractless raceme; pedicles slender, spreading to up-curved, 7-15 mm. long; sepals 4, erect,1.5-2.2 mm. long; petals 4, white, 3-4 mm. long; stamens 6; style nearly lacking.
Fruits: Silicles strongly obcompressed, oval to oblong-obcordate, narrowly notched, 10-17 mm. long, wing-margined all around, the sinus 1.5-2.5 mm. deep; seeds in 1 series.
Accepted Name:
Thlaspi arvense L.Synonyms:
(none)
Treated in Flora of the PNW as:
Thlaspi arvense
Additional Resources:
PNW Herbaria Specimens: View list of Thlaspi arvense specimens in the Consortium of Pacific Northwest Herbaria database.
WTU Herbarium Specimens: View list of Thlaspi arvense specimens in the WTU Herbarium database.
Washington Flora Checklist: Thlaspi arvense treatment.
E-Flora BC: Thlaspi arvense atlas page.
CalPhotos: Thlaspi arvense images.
USDA Plants Database: Thlaspi arvense.
Ben Legler, 2004
Ben Legler, 2004
Ben Legler, 2004
Ben Legler, 2004
Ben Legler, 2004
Ben Legler, 2004
Ben Legler, 2004
Sue Winterowd, 2005
G. D. Carr, 1988
G. D. Carr, 2009
G. D. Carr, 2009
G. D. Carr, 2009
G. D. Carr, 2009
G. D. Carr, 2010
G. D. Carr, 2010
G. D. Carr, 2010
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 WA Native Plant Society |
