Lupinus rivularis (Riverbank Lupine)


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Plant Description: This lupine sometimes is considered a subshrub, forming a woody base at times. Stems are reddish brown, and leaves are well spaced and composed of 5-9 leaflets. Inflorescence is a large open spike with flowers in whorls. The pea-like flowers in streambank lupine are two toned, ranging from purple to creamy white. The fruit is a somewhat hairy pod that turns dark as it ages.

  • Height: 2ft
  • Width: 1.5ft
  • Watering needs: Moist to wet
  • Sun needs: Full sun to partial shade
  • Soil needs: Wet, fine-textured soil
  • Bloom Time: May-August
  • Portland Plant List (Backyard Habitat Certification): Yes

Landscape Use and Ecological Function: This Willamette Valley native is found only in the Pacific Northwest. It grows in riparian zones including gravel near marshes, stream banks, and wet to moist meadows, at low elevations more commonly near the coast. This plant is excellent for meadowscapes and rain gardens. Its primary function is to attract pollinators. 

*Photo by SevenOaks Nursery*

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