stinging lupine

Lupinus hirsutissimus

Member of lupines (genus Lupinus)
legume family (family Fabaceae)
dicots (class Magnoliopsida)
red purple, pink in flowering plants

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• habit: annual 20–100 cm (often > 100 cm after fire), short-appressed- and stiff-spreading-stinging-hairy
• leaf: petiole 4–9 cm; leaflets 5–8, 20–50 mm, 10–20 mm wide
• inflorescence: 10–30 cm, flowers spiralled; peduncle 5–8 cm; pedicels 2–5 mm; bracts 4–5 mm, generally persistent
• flower: 12–18 mm; calyx 6–10 mm, lips ± equal, upper deeply lobed; petals dark pink to magenta, drying ± purple, banner spot ± yellow, in age magenta
• keel upper margins glabrous, lower densely ciliate middle to near claw
• Fremont Older, Castle Rock, Nisene Marks

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: 5 (all are research grade)

Locations:

• Castle Rock SP: 2
• Fremont Older OSP: 2
• Cupertino, CA

Months:

• Apr.: 1
• May: 1
• Jun.: 3

For more details, use advanced search.

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Not all sites include this taxon:

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

Bay Area species: iNaturalist – Calflora