collared annual lupine

Lupinus truncatus

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

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CalPhotos

• habit: annual 20–30(50) cm, finely hairy, generally appearing glabrous
• leaf: petiole 3–10 cm, flat, leaflet-like; leaflets 5–8, 20–40 mm, 2–5 mm wide, linear, adaxially glabrous, tip generally truncate
• inflorescence: 3–25 cm, flowers sparse, spiralled; peduncle 3–10 cm; pedicels 2–4 mm; bracts 2–5 mm, persistent
• flower: 8–13 mm; calyx 3–4 mm, lips ± equal, upper deeply lobed; banner, wings magenta, banner spot ± yellow, dark magenta in age
• keel tip stout, blunt, upper, lower margins ciliate middle to claw
• along hwy 17 corridor, including Bear Creek Redwoods

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: none

Not all sites include this taxon:

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

Bay Area species: iNaturalist – Calflora