Lupinus latifolius |
Lupinus texensis |
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broad-leaf lupine |
Texas bluebonnet, Texas lupine |
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Habit | Herbs, perennial, 3–24 dm, not fleshy, green, glabrous or hairy. | Herbs, annual, 1.5–4 dm, pubescent, hair appressed or ascending. | ||||||||||||||||
Stems | erect or spreading, branched or unbranched. |
ascending or erect, branched. |
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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, crowded near base; petiole 2–6 cm; leaflets 5 or 6(or 7), blades 10–25 × 6–12 mm, adaxial surface glabrous. |
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Racemes | 16–60 cm; flowers whorled or spirally arranged. |
2–12 cm; flowers spirally arranged. |
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Peduncles | 8–20 cm; bracts deciduous, 8–12 mm. |
3–6 cm; bracts deciduous, 2–3 mm. |
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Pedicels | 2–12 mm. |
4–6 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 mm; calyx 6–8 mm, abaxial lobe entire or cleft, 4–5 mm, adaxial lobe cleft, 2–3 mm, hairs silvery; corolla usually dark blue, rarely white, banner spot bright white, keel glabrous, wings flat. |
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Legumes | 2–4.5 cm, ± densely hairy. |
2.5–3.5 cm, white silky-villous. |
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Cotyledons | deciduous, petiolate. |
deciduous, petiolate. |
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Seeds | 6–10, mottled dark brown, 3–4 mm. |
4 or 5. |
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2n | = 36. |
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Lupinus latifolius |
Lupinus texensis |
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Phenology | Flowering spring–summer. | |||||||||||||||||
Habitat | Prairies, open fields, pastures, roadsides. | |||||||||||||||||
Elevation | 0–600 m. [0–2000 ft.] | |||||||||||||||||
Distribution |
w North America; nw Mexico
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FL; LA; OK; TX; Mexico (Coahuila, Nuevo Léon, Tamaulipas)
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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 texensis is introduced in Florida in Alachua and Pinellas counties. In Texas, it is widespread in the southern two-thirds of the state. (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 | ||||||||||||||||||
Subordinate taxa | ||||||||||||||||||
Synonyms | L. rivularis var. latifolius | |||||||||||||||||
Name authority | J. Agardh: Syn. Lupini, 18. (1835) | Hooker: Bot. Mag. 63: plate 3492. (1836) | ||||||||||||||||
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