Lupinus truncatus |
Lupinus arbustus |
|
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blunt-leaf lupine, collared annual lupine |
grassland lupine (ssp. neolaxiflorus), long-spur lupine, Montana lupine (ssp. pseudoparviflorus), spur lupine |
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Habit | Herbs, annual, 2–5(–8) dm, finely pubescent, appearing glabrous. | Herbs, perennial, 2–7 dm, green or gray-silky. |
Stems | ascending or erect, branched or unbranched. |
erect, ascending, or decumbent, branched. |
Leaves | cauline; petiole flattened and leafletlike, 3–10 cm; leaflets 5–8, blades 20–40 × 2–5 mm, apex usually truncate, adaxial surface glabrous. |
cauline and basal; stipules 4–9 mm; petiole 2–16 cm; leaflets 7–10(–13), blades 20–70 × 3–15 mm, adaxial surface strigose. |
Racemes | 6–35 cm; flowers loosely spirally arranged. |
open, 3–18 cm; flowers whorled. |
Peduncles | 3–10 cm; bracts persistent, 2–5 mm. |
2–5 cm; bracts deciduous, 3–6 mm. |
Pedicels | 2–4 mm. |
1–7 mm. |
Flowers | 8–13 mm; calyx 3–4 mm, lobes ± equal, abaxial lobe entire or shallowly cleft, 2.5–3 mm, adaxial lobe deeply cleft, 1.5–2 mm; corolla banner and wings magenta, banner spot white or yellowish, becoming dark magenta, keel stout, blunt, lower and upper margins ciliate from claw to middle. |
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. |
Legumes | ±3 cm, pubescent. |
2–3 cm, silky. |
Cotyledons | deciduous, petiolate. |
deciduous, petiolate. |
Seeds | 6–8. |
3–6, tan, 5–6 mm. |
Lupinus truncatus |
Lupinus arbustus |
|
Phenology | Flowering spring (Mar–May). | Flowering May–Jul. |
Habitat | Openings in coastal sage scrub, chaparral, oak woodlands, burned areas. | Open sagebrush scrub or mixed-conifer forests. |
Elevation | 0–1200 m. (0–3900 ft.) | 1500–3000 m. (4900–9800 ft.) |
Distribution |
CA; Mexico (Baja California)
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CA; ID; MT; OR; UT; WA; BC
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Discussion | Lupinus truncatus is known in the flora area from San Cruz County southward in the Central and South Coast regions; the South Coast, Transverse, and Peninsular ranges; and the Channel Islands. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
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.) |
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 | |
Name authority | Nuttall ex Hooker & Arnott: Bot. Beechey Voy., 336. (1838) | Douglas: Edwards’s Bot. Reg. 15: plate 1230. (1829) |
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