Page authors: David Giblin, Don Knoke
Lepidium ramosissimum
branched peppergrass

Distribution: Occurring chiefly east of the Cascades crest in Washington; Alaska to California, east to the northern Great Plains and northeastern North America.

Habitat: Sagebrush, ponderosa pine forest openings, roadsides, fields, and other disturbed open areas.

Flowers: June-August

Origin: Native

Growth Duration: Annual, Biennial, Perennial

Conservation Status: Not of concern


Puberulent to retrorsely pubescent winter annual or biennial, the freely-branched stems 1-5 dm. tall.


Basal leaves pinnatifid, the lobes more or less toothed, usually deciduous by flowering; cauline leaves alternate, the lower lanceolate and serrate, the upper linear, entire.


Inflorescence of terminal, open many-flowered racemes, with numerous smaller, axillary racemes from the upper leaves; pedicles equaling the fruit, terete, slender; sepals 4, 1 mm. long; petals 4, white, linear, shorter than the sepals; stamens 2; style lacking.


Silicles elliptic, strongly obcompressed, 2.5-3.5 mm. long, glabrous or pubescent, slightly winged at the tip, shallowly notched, the sinus about 0.2 mm. long.

Accepted Name:
Lepidium ramosissimum A. Nelson
Publication: Bull. Torrey Bot. Club. 26: 124. 1899.

Synonyms & Misapplications:
Lepidium ramosissimum A. Nelson var. bourgeauanum (Thell.) Rollins
Lepidium ramosissimum A. Nelson var. ramosissimum
Additional Resources:

PNW Herbaria: Specimen records of Lepidium ramosissimum in the Consortium of Pacific Northwest Herbaria database.

WA Flora Checklist: Lepidium ramosissimum checklist entry.

E-Flora BC: Lepidium ramosissimum atlas page.

CalPhotos: Lepidium ramosissimum photos.

USDA Plants: Lepidium ramosissimum information.

5 photographs:
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