silver bush lupine

Lupinus albifrons

Member of bush lupine complex (complex Lupinus albifrons)
lupines (genus Lupinus)
legume family (family Fabaceae)
dicots (class Magnoliopsida)
flowering plants (subphylum Angiospermae)

There are no other wild members of this species in the bay area.

silver bush lupine
Lupinus albifrons var. albifrons

shrub 50 cm–5 m; woody ± throughout; trunk is generally distinct
bract 4–8 mm

douglas’ silver lupine
Lupinus albifrons var. douglasii

shrub 1–2 m; woody ± throughout
bract 10–24 mm

silver lupine
Lupinus albifrons var. collinus

subshrub, 20–40 cm; only base and some lower branches are woody
bract 7–9 mm

Toxicity of blue bonnet, lupine (Lupinus spp.):
4 – Ingestion of these plants, especially in large amounts, is expected to cause serious effects to the heart, liver, kidneys or brain. If ingested in any amount, call the poison center immediately.

2 observed taxons / 1 unobserved taxon / 1 key

Chris’s observations: 52 (34 are research grade)

Locations:

Edgewood Park & Natural Preserve: 12
Henry Coe SP: 10
Waterdog Lake & Open Space: 6
Sierra Azul OSP: 5
Sunol Wilderness RP: 4
Yosemite NP: 3
Coyote Hills RP: 2
Golden Gate National Recreation Area: 2
Mt. Madonna SP: 2
Pleasanton Ridge RP: 2
Garrapata SP
Henry Cowell Redwoods SP
Long Ridge OSP
Monte Bello OSP

Months:

Feb.: 8
Mar.: 17
Apr.: 15
May: 7
Jun.: 1
Jul.: 3
Aug.: 0
Sep.: 1

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Not all sites include this taxon:

Lupinus albifrons → iNaturalist – Calflora – CalPhotos – Jepson eFlora
not yet listed → FNA

Bay Area species: iNaturalist – Calflora