coastal bush lupine

(yellow bush lupine)
Lupinus arboreus

Member of bush lupine complex (complex Lupinus albifrons)
lupines (genus Lupinus)
legume family (family Fabaceae)
dicots (class Magnoliopsida)
purple, pale purple, yellow, cream in flowering plants

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• habit: shrub 50–200 cm, green-glabrous to silver-hairy
• stem: woody, erect
• leaf: cauline; stipules 8–12 mm; petiole 2–3(6) cm; leaflets 5–12, 20–60 mm
• inflorescence: 10–30 cm, flowers whorled or not; peduncle 4–10 cm; pedicels 4–10 mm; bract 8–10 mm
• flower: 14–18 mm; calyx upper lip 5–9 mm, 2-toothed, lower 5–7 mm, entire; petals generally yellow (lilac to purple, especially north of central NCo), banner back glabrous (best seen in buds), spot darker or not to white
• keel upper margins ciliate claw to tip, lower glabrous
• very common near the pacific coast, rare elsewhere

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.

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Chris’s observations: 15 (12 are research grade)

Locations:

• Murray Ranch SP: 3
• Butano SP: 2
• Castle Rock SP: 2
• La Honda Creek OSP: 2
• Wilder Ranch SP: 2
• Andrew Molera SP
• Big Basin SP
• Garrapata SP
• Purisima Creek Redwoods OSP

Months:

• May: 1
• Jun.: 5
• Jul.: 6
• Aug.: 2
• Sep.: 0
• Oct.: 0
• Nov.: 1

For more details, use advanced search.

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Not all sites include this taxon:

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

Bay Area species: iNaturalist – Calflora