Lupinus arbustus |
Lupinus antoninus |
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grassland lupine (ssp. neolaxiflorus), long-spur lupine, Montana lupine (ssp. pseudoparviflorus), spur lupine |
Anthony Peak lupine |
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Habit | Herbs, perennial, 2–7 dm, green or gray-silky. | Herbs, perennial, 2–5 dm, gray- to silvery-hairy. |
Stems | erect, ascending, or decumbent, branched. |
decumbent-erect, branched. |
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, 10–12 mm; petiole 1–2 cm; leaflets 6 or 7, blades 15–25 × 3–7 mm, adaxial surface pubescent. |
Racemes | open, 3–18 cm; flowers whorled. |
open, 4–20 cm; flowers spirally arranged. |
Peduncles | 2–5 cm; bracts deciduous, 3–6 mm. |
1–4 cm; bracts semideciduous, 7–8 mm. |
Pedicels | 1–7 mm. |
3–4 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. |
12–14 mm; calyx bulge or spur 0–1 mm, abaxial lobe 3-toothed, 6–8 mm, adaxial lobe 2-toothed, 6–8 mm; corolla white, banner patch turning tawny, banner glabrous abaxially, keel upcurved, glabrous, banner ovate, wings wide, covering keel tip. |
Legumes | 2–3 cm, silky. |
2.5–3.5 cm, silky. |
Cotyledons | deciduous, petiolate. |
deciduous, petiolate. |
Seeds | 3–6, tan, 5–6 mm. |
4 or 5, mottled brown, 7–11 mm. |
Lupinus arbustus |
Lupinus antoninus |
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Phenology | Flowering May–Jul. | Flowering Jun–Jul. |
Habitat | Open sagebrush scrub or mixed-conifer forests. | Open fir forests. |
Elevation | 1500–3000 m. (4900–9800 ft.) | ca. 2000 m. (ca. 6600 ft.) |
Distribution |
CA; ID; MT; OR; UT; WA; BC
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CA |
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 antoninus is known only from the type locality on the southwestern slope of Anthony Peak in Mendocino County. The habit and pubescence resemble those of L. adsurgens, but the larger white flowers, the large seeds, and thick stems differentiate it morphologically. According to M. Conrad (1980), it also has different alkaloids. This taxon has not been seen since 1995 and may be extirpated. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Source | FNA vol. 11. | FNA vol. 11. |
Parent taxa | Fabaceae > subfam. Faboideae > Lupinus | Fabaceae > subfam. Faboideae > Lupinus |
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. adsurgens var. lilacinus |
Name authority | Douglas: Edwards’s Bot. Reg. 15: plate 1230. (1829) | Eastwood: Leafl. W. Bot. 3: 202. (1943) |
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