Page author: David Giblin
Descurainia longepedicellata
mountain tansymustard, narrow tansymustard, sticky tansymustard

Distribution: Occurring east of the Cascades crest in Washington; British Columbia to Oregon and Nevada, east to the Rocky Mountains from Montana to Arizona, but not New Mexico.

Habitat: Moderately dry forest openings and sagebrush desert.

Flowers: April-June

Origin: Native

Growth Duration: Annual

Conservation Status: Not of concern

Pollination: Bees, flies


Sub-glabrous and greenish to stellate and grayish annual, the stems 2-10 dm. tall, usually branched and with stalked glands.


Leaves alternate, ovate to oblanceolate, 2-10 cm. long, the lower ones pinnate-pinnatifid, the ultimate segments 1-3 mm. broad, becoming pinnatifid and slightly toothed or lobed above.


Inflorescence of densely flowered, bractless racemes; pedicles slender, spreading to ascending, 4-8 mm. long; sepals 4, spreading, 1-2.5 mm. long; petals 4, pale to deep yellow, clawed, 1.5-3.5 mm. long; stamens 6; style 0.1-0.7 mm. long.


Siliques nearly straight, 5-17 mm. long and 1-1.5 mm. broad, appearing lumpy, tapered and acute at each end; seeds in 1 series.

Accepted Name:
Descurainia longepedicellata (E. Fourn.) O.E. Schulz
Publication: Pflanzenr. 86[IV,105]: 324. (as longipedicellata). 1924.

Synonyms & Misapplications:
Descurainia incisa (Engelm. ex A. Gray) Britton ssp. filipes (A. Gray) Rollins [Rollins 1993a]
Descurainia pinnata (Walter) Britton ssp. filipes (A. Gray) Detling [KZ99]
Descurainia pinnata Britton var. filipes (A. Gray) M. Peck [HC]
Additional Resources:

PNW Herbaria: Specimen records of Descurainia longepedicellata in the Consortium of Pacific Northwest Herbaria database.

WA Flora Checklist: Descurainia longepedicellata checklist entry.

OregonFlora: Descurainia longepedicellata information.

E-Flora BC: Descurainia longepedicellata atlas page.

CalPhotos: Descurainia longepedicellata photos.

USDA Plants: Descurainia longepedicellata information.

34 photographs:
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