Lupinus diffusus |
Lupinus fulcratus |
|
---|---|---|
Oak Ridge lupine, skyblue lupine |
green stipuled lupine, greenstipule lupine |
|
Habit | Herbs, usually perennial, sometimes annual or biennial, 2–8 dm, densely silky-pubescent, silvery becoming rusty or tawny. | Herbs, perennial, 3–8 dm, green, spreading-hairy. |
Stems | decumbent, spreading, many branched. |
erect, unbranched or branched. |
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; stipules green, leaflike, lanceolate, 6–30 mm; petiole 3–6 cm; leaflets 6–9, blades 20–60 × 4–8 mm, adaxial surface pubescent. |
Racemes | 8–30 cm; flowers whorled. |
3–20 cm; flowers ± whorled. |
Peduncles | 3–4 cm; bracts deciduous, 4–8 mm. |
1–11 cm; bracts deciduous, 4–10 mm. |
Pedicels | 1–4 mm. |
2–7 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. |
10–14 mm; calyx bulge or spur 0–1 mm, abaxial lobe entire or 3-toothed, 5–12 mm, adaxial lobe 2-toothed, 5–10 mm; corolla blue, banner patch white, banner glabrous abaxially, keel upcurved, usually glabrous, sparsely hairy near middle of adaxial margin. |
Legumes | 3–5 cm, appressed villous to sericeous. |
2–4 cm, silky. |
Cotyledons | deciduous, petiolate. |
deciduous, petiolate. |
Seeds | 4–7, gray mottled black, 4 mm. |
2–6, beige, mottled brown, 4–5 mm. |
Lupinus diffusus |
Lupinus fulcratus |
|
Phenology | Flowering Mar–May (year-round). | Flowering May–Sep. |
Habitat | Sandhills, sand pine scrub, open woodlands. | In mixed conifer forests, on granitic soils. |
Elevation | 0–50 m. (0–200 ft.) | 1500–3000 m. (4900–9800 ft.) |
Distribution |
AL; FL; GA; MS; NC; SC
|
CA
|
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.) |
Lupinus fulcratus is found at higher elevations in the Sierra Nevada. It closely resembles L. andersonii except for the leaflike stipules. Lupinus ionewalkerae C. P. Smith, L. lingulae C. P. Smith, and L. cymbaegressus C. P. Smith may be hybrids with L. andersonii (P. A. Munz 1959). (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Source | FNA vol. 11. | FNA vol. 11. |
Parent taxa | ||
Sibling taxa | ||
Synonyms | L. cumulicola | L. albicaulis var. fulcratus, L. andersonii var. fulcratus, L. beaneanus, L. finitus, L. fraxinetorum |
Name authority | Nuttall: Gen. N. Amer. Pl. 2: 93. (1818) | Greene: Pittonia 3: 159. (1897) |
Web links |