Lupinus arbustus |
Lupinus elatus |
|
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grassland lupine (ssp. neolaxiflorus), long-spur lupine, Montana lupine (ssp. pseudoparviflorus), spur lupine |
silky lupine, tall silky lupine |
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Habit | Herbs, perennial, 2–7 dm, green or gray-silky. | Herbs, perennial, 5–9 dm, silvery-woolly to -silky. |
Stems | erect, ascending, or decumbent, branched. |
ascending or erect, clustered, branched, short-silky. |
Leaves | cauline and basal; stipules 4–9 mm; petiole 2–16 cm; leaflets 7–10(–13), blades 20–70 × 3–15 mm, adaxial surface strigose. |
cauline; stipules not leaflike, green to silvery, 5–17 mm; petiole 2–5 cm; leaflets 6–8, blades 20–80 × 2–7 mm, widest below middle, adaxial surface pubescent, hairs densely silver-silky to woolly. |
Racemes | open, 3–18 cm; flowers whorled. |
5–40 cm; flowers ± whorled. |
Peduncles | 2–5 cm; bracts deciduous, 3–6 mm. |
2–8 cm; bracts deciduous, 6–11 mm. |
Pedicels | 1–7 mm. |
2–4 mm. |
Flowers | 8–14 mm; calyx spur distinct, 1–3 mm, abaxial lobe 3-toothed, 2.5–5 mm, 1–3 mm, adaxial lobe 2-toothed, 2–4 mm; corolla blue, purple, pink, white, or yellowish, banner patch white, yellowish, or absent, banner hairy abaxially, wings with dense hair patch outside near tip, lower keel margins glabrous, adaxial margin ciliate. |
10–14 mm; calyx bulge or spur 0–1 mm, abaxial lobe 3-toothed, 6–8 mm, adaxial lobe notched, 5–7 mm; corolla lavender to blue, banner patch pale yellowish, banner usually glabrous abaxially, keel upcurved, glabrous, banner ovate, wings wide, covering keel tip. |
Legumes | 2–3 cm, silky. |
2–3 cm, pubescent. |
Cotyledons | deciduous, petiolate. |
deciduous, petiolate. |
Seeds | 3–6, tan, 5–6 mm. |
4–6, mottled olive brown, 5–6 mm. |
Lupinus arbustus |
Lupinus elatus |
|
Phenology | Flowering May–Jul. | Flowering Jun–Aug. |
Habitat | Open sagebrush scrub or mixed-conifer forests. | Dry conifer forests. |
Elevation | 1500–3000 m. [4900–9800 ft.] | 1500–3000 m. [4900–9800 ft.] |
Distribution |
CA; ID; MT; OR; UT; WA; BC
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CA
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Discussion | Lupinus arbustus is known from the Cascade and Klamath ranges, San Gabriel Mountains, Sierra Nevada, and the Great Basin area in California; Owyhee Desert in Idaho and Oregon; eastern Washington and western Montana; and western Juab and Tooele counties, Utah. Lupinus arbustus is separated from the argenteus group by the presence of hairs on the corolla wings. Recognition of subspecies and varieties of this already complex species leads to precarious separation among taxa. Lupinus variegatus A. Heller (1912, not Poiret 1814) is an illegitimate name that pertains here. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Lupinus elatus is found at high elevations in the southern Sierra Nevada and Transverse Ranges. It closely resembles L. adsurgens and L. andersonii. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Source | FNA vol. 11. | FNA vol. 11. |
Parent taxa | ||
Sibling taxa | ||
Synonyms | L. arbustus subsp. calcaratus, L. arbustus var. montanus, L. arbustus subsp. neolaxiflorus, L. arbustus subsp. pseudoparviflorus, L. arbustus subsp. silvicola, L. caesius, L. caudatus var. submanens, L. caudatus var. subtenellus, L. elegantulus, L. inyoensis var. demissus, L. laxiflorus var. calcaratus, L. laxiflorus var. cognatus, L. laxiflorus var. elmerianus, L. laxiflorus var. lyleianus, L. laxiflorus var. pseudoparviflorus, L. laxiflorus var. silvicola, L. laxiflorus var. villosulus, L. lyleianus, L. mucronulatus var. umatillensis, L. multitinctus, L. noldekeae, L. proteanus, L. pseudoparviflorus, L. silvicola, L. wenatchensis, L. yakimensis | L. albicaulis var. elatus, L. formosus var. elatus |
Name authority | Douglas: Edwards’s Bot. Reg. 15: plate 1230. (1829) | I. M. Johnston: Bull. S. Calif. Acad. Sci. 17: 63. (1918) |
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