Lupinus latifolius |
Lupinus havardii |
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broad-leaf lupine |
Big Bend bluebonnet |
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Habit | Herbs, perennial, 3–24 dm, not fleshy, green, glabrous or hairy. | Herbs, annual, 1–6 dm, ascending- or appressed-villous. | ||||||||||||||||
Stems | erect or spreading, branched or unbranched. |
ascending or erect, usually branched, sometimes unbranched. |
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Leaves | cauline, basal when present withered by anthesis; stipules 5–10 mm; petiole 4–20 cm; leaflets 5–11, blades 40–100 × 6–24 mm, abaxial surface ± hairy, adaxial surface glabrous or hairy. |
cauline, often crowded near base; petiole 2–9 cm, ascending- or appressed-pubescent; leaflets (5 or)7, blades 10–20 × 5–10 mm, adaxial surface glabrate. |
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Racemes | 16–60 cm; flowers whorled or spirally arranged. |
18–45 cm; flowers well spaced, usually spirally arranged. |
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Peduncles | 8–20 cm; bracts deciduous, 8–12 mm. |
5.5–10 cm; bracts deciduous, 4–5 mm. |
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Pedicels | 2–12 mm. |
5–7 mm. |
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Flowers | 8–18 mm; calyx abaxial lobe entire or notched, 4–8 mm, adaxial lobe entire or 2-toothed, 5–10 mm; corolla blue or purple to white, banner patch usually white to yellowish turning purple, banner glabrous abaxially, lower keel margins usually ciliate, adaxial margin ciliate from claw to middle. |
10–13(–15) mm; calyx 6–7 mm, abaxial lobe entire, 6 mm, adaxial lobe 3-cleft, 4 mm; corolla bright violet-blue, banner spot creamy or yellow, keel glabrous. |
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Legumes | 2–4.5 cm, ± densely hairy. |
3.5–5 cm, villous. |
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Cotyledons | deciduous, petiolate. |
usually persistent, usually inconspicuous, petiolate. |
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Seeds | 6–10, mottled dark brown, 3–4 mm. |
6–8. |
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2n | = 36. |
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Lupinus latifolius |
Lupinus havardii |
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Phenology | Flowering late winter–early spring. | |||||||||||||||||
Habitat | Limestone or igneous basins, flats, drainages, gravelly, sandy or silty soils, creosote-lechuguilla shrublands, roadsides. | |||||||||||||||||
Elevation | 600–1400 m. [2000–4600 ft.] | |||||||||||||||||
Distribution |
w North America; nw Mexico
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TX; Mexico (Chihuahua) |
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Discussion | Varieties 5 (5 in the flora). Various authors have differed in their circumscriptions of Lupinus latifolius. For example, P. K. Vaughn and D. B. Dunn (1977) recognized three varieties, D. Isely (1998) recognized six varieties, and C. L. Hitchcock et al. (1955–1969, vol. 3) recognized three varieties. The most conservative approach has been taken here by recognizing taxa that have the clearest characteristics, but that approach might not reflect phylogeny. Research is needed to clarify the varieties and particularly the relationships among L. latifolius and L. arcticus, L. perennis, and L. polyphyllus. Lupinus latifolius is known to cause birth defects in livestock (R. F. Keeler et al. 1977). (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Lupinus havardii is known from the trans-Pecos region of Texas. (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 | ||||||||||||||||||
Sibling taxa | ||||||||||||||||||
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Synonyms | L. rivularis var. latifolius | |||||||||||||||||
Name authority | J. Agardh: Syn. Lupini, 18. (1835) | S. Watson: Proc. Amer. Acad. Arts 17: 369. (1882) — (as havardi) | ||||||||||||||||
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