Lupinus nanus |
Lupinus brevicaulis |
|
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Douglas' annual lupine, dwarf lupin, field lupine, fleshy lupine, miniature lupine, sky lupine, two-color lupine, valley sky lupine |
sand lupine, short stem blue lupine, short-stem lupine |
|
Habit | Herbs, annual, 1–6 dm, pubescent. | Herbs, annual, usually less than 1 dm, pubescent, hairs more than 1 mm. |
Stems | ascending or erect, branched or unbranched. |
very short, tufted, branched. |
Leaves | cauline; petiole 2–8.5 cm; leaflets 5–7(–9), blades 10–40 × 1–12 mm, adaxial surface pubescent. |
cauline, crowded near base; stipules well developed; petiole 1–6 cm; leaflets (3 or)5–9, blades 8–20 × 2–9 mm, adaxial surface glabrous. |
Racemes | 4–40 cm; flowers usually whorled, sometimes spirally arranged distally. |
dense, 3–16-flowered, 1–8 cm; flowers spirally arranged, crowded. |
Peduncles | 2–15 cm; bracts deciduous, 4–12 mm. |
1–8(–10) cm; bracts persistent, straight, 2–3 mm. |
Pedicels | 2.5–7 mm. |
0.3–1.5 mm. |
Flowers | 6–15 mm; calyx 4–8 mm, lobes ± equal, adaxial lobe deeply cleft; corolla usually blue, rarely light blue, lavender, pink, white, banner spot white, upper keel margins ciliate near apex, banner as wide as or wider than long. |
6–8 mm; calyx abaxial lobe entire or shallowly cleft, ± 6 mm, adaxial lobe 2-toothed, 3 mm, less than 1/2 as long as abaxial; corolla bright blue, banner spot white or yellow, keel glabrous. |
Legumes | 2–4 × 0.4–0.7 cm, pubescent. |
not undulate, 1 cm, thinly pilose to coarsely hirsute. |
Cotyledons | deciduous, petiolate. |
persistent, disclike, sessile. |
Seeds | 4–12. |
1 or 2, smooth. |
2n | = 48. |
|
Lupinus nanus |
Lupinus brevicaulis |
|
Phenology | Flowering late winter–spring. | Flowering spring. |
Habitat | Open or disturbed areas. | Sandy washes, open areas, grasslands, pinyon pine-juniper forests, creosote bush scrub, mesquite. |
Elevation | 0–1300 m. (0–4300 ft.) | 300–2400 m. (1000–7900 ft.) |
Distribution |
CA; OR; WA
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AZ; CA; CO; NM; NV; OR; UT; WY; Mexico (Chihuahua, Sonora)
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Discussion | Lupinus nanus is a highly variable complex. Plants in northern California and southwestern Oregon, referred to as L. vallicola, have smaller flowers and may be confused with L. bicolor. Lupinus nanus occurs throughout California except in the Great Basin and desert regions and northward to Washington. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Lupinus brevicaulis resembles L. flavoculatus except that its flowers are smaller. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Source | FNA vol. 11. | FNA vol. 11. |
Parent taxa | ||
Sibling taxa | ||
Synonyms | L. blaisdellii, L. nanus var. apricus, L. nanus subsp. latifolius, L. nanus var. maritimus, L. nanus subsp. menkerae, L. nanus var. menkerae, L. nanus var. vallicola, L. vallicola, L. vallicola var. apricus | |
Name authority | Douglas ex Bentham: Trans. Hort. Soc. London, ser. 2, 1: 409, plate 14, fig. 2. (1835) | S. Watson: Botany (Fortieth Parallel), 53, plate 7, figs. 1–4. (1871) |
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