Lupinus arboreus
Fabaceae
Tree Lupine
Shrub green to silver-haired. Stems woody, upright. Leaves occur on stems with petioles 1–2 in. long. Leaves palmately divided into 5–12 leaflets. Flower spike 4–12 in. long, with fragrant, sulphur-yellow flowers about 1/2 in. long. Grows on coastal bluffs, sand dunes and inland. Native in California, introduced in Oregon, Washington, and Canada to control erosion on sand dunes and steep banks. Plants with purple or lilac flowers are sometimes found and thought to be hybrids.
- Rarity: Locally Common
- Flowering Time: Early Spring, Mid Spring, Late Spring, Early Summer, Mid Summer, Late Summer
- Flower Form: Pea flowers, palmate leaves
- Life Cycle: Perennial
- Height: to 80 inches
- Habitat: Coastal
- Found In: Olympic NP
- Native: Yes
- Also Known As: Yellow Bush Lupine
