Page authors: Ben Legler, David Giblin
Lepidium perfoliatum
clasping-leaved peppergrass, round-leaved peppergrass, yellow-flowered peppergrass
Immature silicles.

Distribution: Occurring chiefly east of the Cascades crest in Washington; British Columbia to California, east to the Atlantic Coast.

Habitat: Disturbed areas, such as overgrazed land and waste areas, usually where dry.

Flowers: March-June

Origin: Introduced from Eurasia

Growth Duration: Annual, Biennial

Conservation Status: Not of concern


Annual herb with simple or branched stems 20-60 cm tall.


Alternate; lower leaves deeply pinnately dissected or compound; upper leaves simple and strongly clasping the stem.


Yellow, small, with 4 petals; in elongate racemes at ends of stems.


Small ovate capsules (silicles) to 4 mm long.

Identification Notes:

Look for the dissected lower leaves, strongly clasping (seemingly perfoliate) upper leaves, small yellow flowers with 4 petals, and small ovate silicles.

Accepted Name:
Lepidium perfoliatum L.
Publication: Sp. Pl. 2: 643. 1753.

Synonyms & Misapplications:
Nasturtium perfoliatum (L.) Besser
Additional Resources:

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

WA Flora Checklist: Lepidium perfoliatum checklist entry.

E-Flora BC: Lepidium perfoliatum atlas page.

CalPhotos: Lepidium perfoliatum photos.

USDA Plants: Lepidium perfoliatum information.

32 photographs:
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