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Perennial Pepperweed Lepidium latifolium


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Perennial Pepperweed
© Richard Old/

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Alternate name: Broadleaf Pepperwort

Family: Brassicaceae, Mustard view all from this family

Description Introduced. A dense, leafy, upright-growing plant topped with crowded clusters of small yellowish to white flowers.
Flowers: small; petals narrow, stalk-like at base; in dense panicles.
Leaves: 4-12" (10-30 cm); basal leaves longest, stem leaves smaller; lance-shaped; may have wavy edges.
Height: 1 1/2-6 1/2' (0.4-2 m)

Habitat Roadsides, agricultural fields, riversides, waste areas, beaches and other coastal habitats, sagebrush and other shrub communities, marshy areas.

Range Native of Eurasia and northern Africa; naturalized in many areas of western North America and scattered areas in the East.

Discussion Widely considered a noxious pest in the West, Perennial Pepperweed sprouts from roots and rhizomes, forming dense colonies that can exclude all other vegetation.