Lupinus lepidus |
Lupinus lepidus var ashlandensis |
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Donner Lake lupine, dwarf lupine, Lobb's lupine, Pacific lupine, prairie lupine, prostrate lupine, stool lupine, tidy lupine |
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Habit | Herbs, perennial, less than 6 dm, matted, hairy. | Herbs 7–12 cm, hairs long-dense, appressed, silvery. | ||||||||||||||||||||||||||||||||||||||
Stems | acaulescent or prostrate to ± erect, unbranched or branched. |
absent. |
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Leaves | usually basal, sometimes cauline present; stipules 3–25 mm; petiole 2–13 cm; leaflets 5–8, blades 5–40 × 3–7 mm, surfaces pubescent. |
basal; leaflet blades 10–20 mm, surfaces with long, dense, silvery-appressed hairs. |
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Racemes | dense, 3–20 cm, not exceeding to exserted beyond leaves; flowers whorled, usually crowded. |
3–8 cm (not including peduncle), slightly exceeding leaves, dense. |
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Peduncles | 2–13 cm; bracts usually persistent, 4–15 mm. |
(3–)5–7.5 cm; bracts 5 mm. |
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Pedicels | 0.4–3 mm. |
1 mm. |
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Flowers | 6–13 mm; calyx bulge or spur 0–1 mm, abaxial lobe entire or 3-toothed, 4–7 mm, adaxial lobe entire or 2-toothed, 3–7 mm; corolla pink, violet, or blue, banner glabrous abaxially, lower keel margins glabrous, adaxial margin ciliate. |
in 9–13 whorls, 9–12 mm; calyx abaxial lobe 2–3 mm, adaxial lobe 5 mm; corolla blue-violet. |
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Legumes | 1–2 cm, hairy. |
7–11 mm, pubescent. |
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Cotyledons | deciduous, petiolate. |
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Seeds | 2–6, ± mottled tan or green to brown, 2–4 mm. |
2–4. |
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2n | = 48. |
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Lupinus lepidus |
Lupinus lepidus var ashlandensis |
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Phenology | Flowering Jun–Aug. | |||||||||||||||||||||||||||||||||||||||
Habitat | Alpine slopes. | |||||||||||||||||||||||||||||||||||||||
Elevation | 2100–2300 m. (6900–7500 ft.) | |||||||||||||||||||||||||||||||||||||||
Distribution |
w North America
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OR |
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Discussion | Varieties 10 (10 in the flora). Dwarf perennial lupines are usually characterized by a cespitose habit, persistent inflorescence bracts, banners that are glabrous abaxially, and ciliate keel petals. The history of the taxonomy of this group was discussed in detail by B. J. Cox (1972), R. C. Barneby (1989), and K. A. Weitemier (2010). Barneby gave justification for his conservative treatment of this taxon, which is generally followed here. Genetic analysis in lupines has shown little separation, according to Weitemier, but he suggested that there is good evidence to retain these variations as varieties, following Barneby, rather than elevating them to species level. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Variety ashlandensis is known only from Mount Ashland in the Siskiyou Mountains of Jackson County. (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 | Fabaceae > subfam. Faboideae > Lupinus | Fabaceae > subfam. Faboideae > Lupinus > Lupinus lepidus | ||||||||||||||||||||||||||||||||||||||
Sibling taxa | ||||||||||||||||||||||||||||||||||||||||
Subordinate taxa | ||||||||||||||||||||||||||||||||||||||||
Synonyms | L. aridus subsp. ashlandensis | |||||||||||||||||||||||||||||||||||||||
Name authority | Douglas ex Lindley: Bot. Reg. 14: plate 1149. (1828) | (B. J. Cox) Isely: Native Natural. Legum. U.S., 705. (1998) | ||||||||||||||||||||||||||||||||||||||
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