Lupinus arbustus |
Lupinus malacophyllus |
|
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grassland lupine (ssp. neolaxiflorus), long-spur lupine, Montana lupine (ssp. pseudoparviflorus), spur lupine |
jawleaf lupine |
|
Habit | Herbs, perennial, 2–7 dm, green or gray-silky. | Herbs, annual, 0.7–1.6 dm, softly villous, with fine, spreading hairs, hairs more than 1 mm. |
Stems | erect, ascending, or decumbent, branched. |
ascending or erect, branched or unbranched. |
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; stipules well developed; petiole 1.5–4.5 cm; leaflets 5–7, blades 7–22 × 3–6 mm, adaxial surface softly villous. |
Racemes | open, 3–18 cm; flowers whorled. |
well exserted, several–many-flowered, 3–7 cm; flowers crowded, whorled proximally, becoming spirally arranged distally. |
Peduncles | 2–5 cm; bracts deciduous, 3–6 mm. |
2–5.5 cm; bracts persistent, 5–7 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. |
8–10 mm; calyx 5–8 mm, lobes unequal, adaxial lobe less than 1/2 as long as abaxial; corolla blue or whitish and blue-tipped, keel glabrous. |
Legumes | 2–3 cm, silky. |
not obviously undulate, 1–1.3 cm, softly villous-pilose. |
Cotyledons | deciduous, petiolate. |
persistent or deciduous, disclike, sessile, leaving a circular scar. |
Seeds | 3–6, tan, 5–6 mm. |
2. |
Lupinus arbustus |
Lupinus malacophyllus |
|
Phenology | Flowering May–Jul. | Flowering spring–early summer (mid Apr–Jun). |
Habitat | Open sagebrush scrub or mixed-conifer forests. | Colonial in openings among sagebrush on sandy or gravelly flats and foothill slopes. |
Elevation | 1500–3000 m. [4900–9800 ft.] | 1400–1800 m. [4600–5900 ft.] |
Distribution |
CA; ID; MT; OR; UT; WA; BC
|
NV |
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 malacophyllus is known from Washoe and adjacent counties. (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 | |
Name authority | Douglas: Edwards’s Bot. Reg. 15: plate 1230. (1829) | Greene: Pittonia 1: 215. (1888) |
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