Lupinus arizonicus |
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Arizona lupine |
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Habit | Herbs, annual, 1–6 dm, with short-appressed and long, spreading hairs. |
Stems | erect, usually branched, sometimes unbranched. |
Leaves | cauline; petiole 2–8 cm; leaflets 5–10, blades 10–40 × 4–12 mm, adaxial surface glabrous. |
Racemes | 6–30 cm; flowers spirally arranged or appearing ± whorled proximally. |
Peduncles | 1–6 cm; bracts usually persistent, 4–8 mm. |
Pedicels | 2–4 mm. |
Flowers | 7–10 mm; calyx 3–6 mm, lobes ± equal, abaxial lobe entire, adaxial lobe deeply cleft; corolla banner and wings dark pink to magenta, drying blue-purple or whitish, banner spot yellowish, becoming darker magenta, lower keel margins ciliate near claw, upper margins glabrous. |
Legumes | often secund, 1–2 cm, coarsely pubescent. |
Cotyledons | deciduous, petiolate. |
Seeds | 4–6. |
2n | = 48. |
Lupinus arizonicus |
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Phenology | Flowering spring. |
Habitat | Sandy washes, open areas. |
Elevation | 0–1100 m. (0–3600 ft.) |
Distribution |
AZ; CA; NV; Mexico (Baja California, Baja California Sur, Sonora)
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Discussion | Lupinus arizonicus occurs in the eastern Mojave and Sonora deserts of southeastern California, southwestern Arizona, and southern Nevada, plus adjacent areas in northern Mexico. Robust plants have been named var. barbatulus. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Source | FNA vol. 11. |
Parent taxa | |
Sibling taxa | |
Synonyms | L. concinnus var. arizonicus, L. arizonicus var. barbatulus, L. brevior, L. concinnus var. brevior, L. sparsiflorus var. arizonicus, L. sparsiflorus var. barbatulus |
Name authority | (S. Watson) S. Watson: Proc. Amer. Acad. Arts 12: 250. (1877) |
Web links |