Lupinus pusillus var. intermontanus |
Lupinus pusillus |
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intermontane lupine, intermountain lupine, low lupine, rusty lupine |
intermountain lupine, low lupine, rusty lupine |
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Habit | Herbs, annual, 0.5–2 dm, sparsely pubescent to pilose, hairs more than 1 mm. | |||||||||
Stems | short and tufted or erect, branched from base or near middle. |
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Leaves | cauline, often crowded near base; stipules well developed; petiole 1–9 cm; leaflets 5–9, blades 10–40 × 5–10 mm, adaxial surface glabrous. |
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Racemes | 2–5 cm, usually shorter than foliage. |
8–12-flowered, 2–11 cm, shorter than or slightly exceeding foliage; flowers spirally arranged. |
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Peduncles | 0–1 cm. |
0–3.5 cm; bracts persistent, straight, 2–5 mm. |
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Pedicels | strigose. |
1–3.5 mm. |
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Flowers | 6–8 mm; calyx tube strigose. |
5–12 mm; calyx abaxial lobe entire, 5–6 mm, adaxial lobe cleft, 2.5–4 mm; corolla vivid blue, sometimes paler or white, sometimes bicolored, banner spot white or yellowish, keel glabrous. |
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Legumes | 1.5 cm, constricted between seeds, thinly pilose to coarsely hirsute. |
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Cotyledons | persistent, disclike, sessile. |
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Seeds | 2, wrinkled or ridged. |
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Lupinus pusillus var. intermontanus |
Lupinus pusillus |
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Phenology | Flowering spring—early summer. | |||||||||
Habitat | Open sandy areas. | |||||||||
Elevation | 1100–1800 m. (3600–5900 ft.) | |||||||||
Distribution |
CA; ID; NV; OR; WA; WY |
w North America; c North America
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Discussion | Varieties 3 (3 in the flora). Lupinus pusillus is a highly variable species, with the varieties intergrading. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
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Key |
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Source | FNA vol. 11. | FNA vol. 11. | ||||||||
Parent taxa | ||||||||||
Sibling taxa | ||||||||||
Subordinate taxa | ||||||||||
Synonyms | L. intermontanus, L. pusillus var. intermontanus, L. pusillus subsp. intermontanus | |||||||||
Name authority | (A. Heller) C. P. Smith: Bull. Torrey Bot. Club 46: 408. (1919) | Pursh: Fl. Amer. Sept. 2: 468. 1814[1813] | ||||||||
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