Lupinus truncatus |
Lupinus formosus |
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blunt-leaf lupine, collared annual lupine |
summer lupine, western lupine |
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Habit | Herbs, annual, 2–5(–8) dm, finely pubescent, appearing glabrous. | Herbs, perennial, 12–8 dm, densely hairy to tomentose, gray to silver; rhizomes 3–7 mm diam. | ||||
Stems | ascending or erect, branched or unbranched. |
ascending, spreading, or erect, branched. |
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Leaves | cauline; petiole flattened and leafletlike, 3–10 cm; leaflets 5–8, blades 20–40 × 2–5 mm, apex usually truncate, adaxial surface glabrous. |
cauline; stipules not leaflike, green to silvery, 4–15 mm; petiole 2–7 cm; leaflets 7–9, blades 25–70 × 6–14 mm, adaxial surface pubescent. |
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Racemes | 6–35 cm; flowers loosely spirally arranged. |
10–30 cm; flowers ± whorled. |
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Peduncles | 3–10 cm; bracts persistent, 2–5 mm. |
3–7 cm; bracts deciduous, 4–14 mm. |
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Pedicels | 2–4 mm. |
3–7 mm. |
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Flowers | 8–13 mm; calyx 3–4 mm, lobes ± equal, abaxial lobe entire or shallowly cleft, 2.5–3 mm, adaxial lobe deeply cleft, 1.5–2 mm; corolla banner and wings magenta, banner spot white or yellowish, becoming dark magenta, keel stout, blunt, lower and upper margins ciliate from claw to middle. |
10–18 mm; calyx bulge or spur 0–1 mm, abaxial lobe entire or 3-toothed, 8–12 mm, adaxial lobe 2-toothed, 7–11 mm; corolla purple, banner patch white or not, banner glabrous abaxially, keel upcurved, glabrous, banner ovate, wings wide, covering keel tip. |
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Legumes | ±3 cm, pubescent. |
3–4.5 cm, hairy. |
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Cotyledons | deciduous, petiolate. |
deciduous, petiolate. |
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Seeds | 6–8. |
5–7, mottled brown, 4–7 mm. |
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Lupinus truncatus |
Lupinus formosus |
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Phenology | Flowering spring (Mar–May). | |||||
Habitat | Openings in coastal sage scrub, chaparral, oak woodlands, burned areas. | |||||
Elevation | 0–1200 m. (0–3900 ft.) | |||||
Distribution |
CA; Mexico (Baja California)
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nw Mexico; California
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Discussion | Lupinus truncatus is known in the flora area from San Cruz County southward in the Central and South Coast regions; the South Coast, Transverse, and Peninsular ranges; and the Channel Islands. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Varieties 2 (2 in the flora). (Discussion copyrighted by Flora of North America; reprinted with permission.) |
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Key |
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Source | FNA vol. 11. | FNA vol. 11. | ||||
Parent taxa | Fabaceae > subfam. Faboideae > Lupinus | Fabaceae > subfam. Faboideae > Lupinus | ||||
Sibling taxa | ||||||
Subordinate taxa | ||||||
Name authority | Nuttall ex Hooker & Arnott: Bot. Beechey Voy., 336. (1838) | Greene: Fl. Francisc., 42. (1891) | ||||
Web links |
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