Lupinus diffusus |
Lupinus pachylobus |
|
---|---|---|
Oak Ridge lupine, skyblue lupine |
big-pod lupine, Mt. Diablo lupine |
|
Habit | Herbs, usually perennial, sometimes annual or biennial, 2–8 dm, densely silky-pubescent, silvery becoming rusty or tawny. | Herbs, annual, 1.5–4 dm, pubescent. |
Stems | decumbent, spreading, many branched. |
ascending or erect, branched or unbranched. |
Leaves | basal, clustered; stipules 20–150 mm; petiole 2.5–10 cm; leaflet 1, blades 40–120 × 18–33 mm, adaxial surface densely sericeous or strigulose. |
cauline; petiole 4–8 cm; leaflets usually 7, blades 20–25 × 2–5 mm, adaxial surface pubescent. |
Racemes | 8–30 cm; flowers whorled. |
4–15 cm; flowers usually whorled, sometimes spirally arranged. |
Peduncles | 3–4 cm; bracts deciduous, 4–8 mm. |
3–12 cm; bracts deciduous, 6 mm. |
Pedicels | 1–4 mm. |
1–2.5 mm. |
Flowers | 11–15 mm; calyx abaxial lobe entire, 5–10 mm, adaxial lobe 3-fid with 2 linear laterals, 4–8 mm; corolla light to deep blue, limb centrally white at base, banner spot white to cream, glabrous abaxially, keel glabrous. |
7–9 mm; calyx 4.5–6 mm, lobes ± equal, abaxial lobe entire, adaxial lobe cleft; corolla blue, banner spot white, becoming dark magenta, keel blunt, glabrous, banner length greater than width. |
Legumes | 3–5 cm, appressed villous to sericeous. |
± fleshy, 3 × 0.6–0.9 cm, densely pubescent. |
Cotyledons | deciduous, petiolate. |
deciduous, petiolate. |
Seeds | 4–7, gray mottled black, 4 mm. |
usually 5. |
Lupinus diffusus |
Lupinus pachylobus |
|
Phenology | Flowering Mar–May (year-round). | Flowering spring. |
Habitat | Sandhills, sand pine scrub, open woodlands. | Open or disturbed areas. |
Elevation | 0–50 m. (0–200 ft.) | 0–600 m. (0–2000 ft.) |
Distribution |
AL; FL; GA; MS; NC; SC
|
CA; WA
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Discussion | Lupinus diffusus differs from the other unifoliolate species in its much shorter pubescence and banners with a white eyespot. Lupinus cumulicola represents peninsular Florida forms that have strongly ascending foliose stems and sometimes broader leaves than usual. Some plants of L. diffusus from southern Florida have a vesture of hairs that approach those of L. villosus in length. Lupinus diffusus seeds are known to be toxic (D. J. Wagstaff 2008). (Discussion copyrighted by Flora of North America; reprinted with permission.) |
In California, Lupinus pachylobus occurs from the foothills of the Cascade Range and Sierra Nevada to the outer North and South Coast ranges. In Washington, it is known from the San Juan Islands. It is uncommon and occurs and intergrades with L. bicolor. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Source | FNA vol. 11. | FNA vol. 11. |
Parent taxa | ||
Sibling taxa | ||
Synonyms | L. cumulicola | |
Name authority | Nuttall: Gen. N. Amer. Pl. 2: 93. (1818) | Greene: Pittonia 1: 65. (1887) |
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