Lupinus bicolor |
Lupinus tracyi |
|
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bicolor lupine, field lupine, Lindley's annual lupine, Lindley's lupine, lupine, miniature lupine, Montana lupine, small-flower lupine, two-color lupine, two-colour lupine |
Tracy's lupine |
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Habit | Herbs, annual, 0.5–4 dm, pubescent. | Herbs, perennial, 4–7 dm, glabrous, glaucous. |
Stems | ascending or erect, branched or unbranched. |
solitary, erect, slender, usually unbranched. |
Leaves | cauline; petiole 1–7 cm; leaflets 5–8, blades 10–40 × 1–5 mm, adaxial surface glabrous or sparsely pubescent. |
cauline; stipules 7–9 mm; petiole to 1 cm; leaflets 6 or 7, blades 10–40 × 4–10 mm, adaxial surface glabrous. |
Racemes | 4–20 cm; flowers usually in fewer than 5 whorls, sometimes spirally arranged. |
4–16 cm; flowers ± whorled or not. |
Peduncles | 3–10 cm; bracts deciduous, 4–6 mm. |
2–6 cm; bracts deciduous, 8–10 mm. |
Pedicels | 1–3.5 mm. |
5–6 mm. |
Flowers | 4–10 mm; calyx abaxial lobe entire, 4–6 mm, adaxial lobe deeply cleft, 2–4 mm; corolla usually blue, rarely light blue, pink, or white, banner spot white, becoming magenta, upper keel margins usually ciliate near apex, rarely glabrous, sometimes blunt, banner longer than wide. |
8–10(–12) mm; calyx bulge or spur 0–1 mm, abaxial lobe 3-toothed, 3–5 mm, adaxial lobe 2-toothed, 3–8 mm; corolla whitish to dull blue (at least in bud), often fading to pale yellow, banner glabrous abaxially, keel glabrous, tip sometimes exserted. |
Legumes | 1–3 × 0.3–0.6 cm, pubescent. |
1.5–2.5 cm, white-hairy, dark when dry. |
Cotyledons | deciduous, petiolate. |
deciduous, petiolate. |
Seeds | 5–8. |
3 or 4, 4–5 mm. |
2n | = 48. |
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Lupinus bicolor |
Lupinus tracyi |
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Phenology | Flowering late winter–spring (Mar–Jun). | Flowering (May–)Jun–Jul. |
Habitat | Open or disturbed areas. | Dry, open montane forests. |
Elevation | 0–1600 m. (0–5200 ft.) | 800–2500 m. (2600–8200 ft.) |
Distribution |
AZ; CA; OR; WA; BC; Mexico (Baja California, Baja California Sur, Sonora)
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CA; OR
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Discussion | Lupinus bicolor is naturalized in Arizona. The named subspecies and varieties do not conform to consistently recognizable geographical or morphological entities (D. B. Dunn 1955). Vigorous plants with larger flowers may be confused with L. nanus. In California, plants on the Outer North Coast Ranges may persist for two growing seasons. Lupinus bicolor (as L. polycarpus) has been reported from Alabama (A. R. Diamond 2016) and Michigan (E. G. Voss and A. A. Reznicek 2012). Lupinus micranthus Douglas (1829, not Gussone 1828) is an illegitimate name that pertains here. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Lupinus tracyi is known from the Klamath Ranges of northern California and adjacent areas in southern Oregon. (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. bicolor subsp. marginatus, L. bicolor var. micranthus, L. bicolor subsp. microphyllus, L. bicolor var. microphyllus, L. bicolor subsp. pipersmithii, L. bicolor var. pipersmithii, L. bicolor var. rostratus, L. bicolor subsp. tridentatus, L. bicolor var. tridentatus, L. bicolor var. trifidus, L. bicolor subsp. umbellatus, L. bicolor var. umbellatus, L. congdonii, L. polycarpus | |
Name authority | Lindley: Bot. Reg. 13: plate 1109. (1827) | Eastwood: Leafl. W. Bot. 2: 268. (1940) |
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