Lupinus arbustus |
Lupinus pratensis |
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grassland lupine (ssp. neolaxiflorus), long-spur lupine, Montana lupine (ssp. pseudoparviflorus), spur lupine |
Inyo Meadow lupine |
|
Habit | Herbs, perennial, 2–7 dm, green or gray-silky. | Herbs, perennial, 3–7 dm, green, hairy. |
Stems | erect, ascending, or decumbent, branched. |
erect, unbranched or branched distally, hollow. |
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. |
basal and cauline, green; stipules 5–20 mm; basal petioles 10–25 cm, cauline 1–4 cm; leaflets 5–10, blades 30–80(–130) × 5–8 mm, adaxial surface strigose, hairs less than 1 mm. |
Racemes | open, 3–18 cm; flowers whorled. |
5–28 cm, usually exceeding leaves; flowers dense. |
Peduncles | 2–5 cm; bracts deciduous, 3–6 mm. |
4–17 cm; bracts persistent, 5–10 mm. |
Pedicels | 1–7 mm. |
1–3 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. |
10–12 mm; calyx bulge or spur 0–1 mm, abaxial lobe entire, 5–6 mm, adaxial lobe 2-toothed, 4–7 mm; corolla violet to dark blue, banner patch orange to red, banner usually glabrous abaxially, rarely hairy, lower keel margins glabrous, adaxial margin densely ciliate. |
Legumes | 2–3 cm, silky. |
1.5–2 cm, hairy to woolly. |
Cotyledons | deciduous, petiolate. |
deciduous, petiolate. |
Seeds | 3–6, tan, 5–6 mm. |
4–6, brown, mottled tan, 3–4 mm. |
Lupinus arbustus |
Lupinus pratensis |
|
Phenology | Flowering May–Jul. | Flowering May–Sep. |
Habitat | Open sagebrush scrub or mixed-conifer forests. | Meadows, stream banks, sagebrush scrub to subalpine forests. |
Elevation | 1500–3000 m. [4900–9800 ft.] | 2000–3500 m. [6600–11500 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 pratensis is known from the southern Sierra Nevada in Fresno, Inyo, Mono, and Tulare counties. Plants from Big Pine Creek in Inyo County with banners that are hairy abaxially have been called var. eriostachyus. (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. pratensis var. eriostachyus, L. sellulus var. elatus |
Name authority | Douglas: Edwards’s Bot. Reg. 15: plate 1230. (1829) | A. Heller: Muhlenbergia 2: 210. (1906) |
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