Coastal Bush Lupine
Lupinus arboreus
Yellow Bush Lupine is a tall, bushy lupine, growing up to 2 meters tall, though it is typically 1-1.5 meters tall. The smooth palmate leaves, ranging 2-6 cm long, are covered in fine, silky hairs. Each leaf is composed of 5-12 narrow leaflets. The yellow, and sometimes purple, pea flowers bloom on approximately 6 inch long stalks.
Basic Information
Member of the Fabaceae (Pea) family
Perennial shrub
There is one recognized variety of this plant, var. eximius, which is limited to San Mateo and Marin Counties and has lavender flowers
Habitat
Native to California
This plant’s native range is somewhat disputed, as it has been widely introduced in the state and abroad; however, it is thought to be native form the Point Reyes National Seashore south to San Luis Obispo County
Has become invasive in Southern California, Baja California, coastal Pacific Northwest, British Columbia, western Europe, Australia, New Zealand, Turkey, and southern South America
Commonly found in coastal sage scrub and sand dunes
Ecological Role
Supports native bees and bumblebees
Fixes nitrogen from the atmosphere into a form that other plants can consume
Reproduction
Blooms from March to June
Alternative Names
Coast Lupine, Tree Lupine
Historical Uses
The Pomo and Kashaya Pomo used the root fibers of this plant for string to create nets and snares
The Kashaya Pomo used the flowers in wreaths for the Flower Dance during the end of summer Strawberry Festival
