Lupinus brevicaulis |
Lupinus nanus |
|
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sand lupine, short stem blue lupine, short-stem lupine |
Douglas' annual lupine, dwarf lupin, field lupine, fleshy lupine, miniature lupine, sky lupine, two-color lupine, valley sky lupine |
|
Habit | Herbs, annual, usually less than 1 dm, pubescent, hairs more than 1 mm. | Herbs, annual, 1–6 dm, pubescent. |
Stems | very short, tufted, branched. |
ascending or erect, branched or unbranched. |
Leaves | 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. |
cauline; petiole 2–8.5 cm; leaflets 5–7(–9), blades 10–40 × 1–12 mm, adaxial surface pubescent. |
Racemes | dense, 3–16-flowered, 1–8 cm; flowers spirally arranged, crowded. |
4–40 cm; flowers usually whorled, sometimes spirally arranged distally. |
Peduncles | 1–8(–10) cm; bracts persistent, straight, 2–3 mm. |
2–15 cm; bracts deciduous, 4–12 mm. |
Pedicels | 0.3–1.5 mm. |
2.5–7 mm. |
Flowers | 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. |
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. |
Legumes | not undulate, 1 cm, thinly pilose to coarsely hirsute. |
2–4 × 0.4–0.7 cm, pubescent. |
Cotyledons | persistent, disclike, sessile. |
deciduous, petiolate. |
Seeds | 1 or 2, smooth. |
4–12. |
2n | = 48. |
|
Lupinus brevicaulis |
Lupinus nanus |
|
Phenology | Flowering spring. | Flowering late winter–spring. |
Habitat | Sandy washes, open areas, grasslands, pinyon pine-juniper forests, creosote bush scrub, mesquite. | Open or disturbed areas. |
Elevation | 300–2400 m. (1000–7900 ft.) | 0–1300 m. (0–4300 ft.) |
Distribution |
AZ; CA; CO; NM; NV; OR; UT; WY; Mexico (Chihuahua, Sonora)
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CA; OR; WA
|
Discussion | Lupinus brevicaulis resembles L. flavoculatus except that its flowers are smaller. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
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.) |
Source | FNA vol. 11. | FNA vol. 11. |
Parent taxa | Fabaceae > subfam. Faboideae > Lupinus | Fabaceae > subfam. Faboideae > Lupinus |
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 | S. Watson: Botany (Fortieth Parallel), 53, plate 7, figs. 1–4. (1871) | Douglas ex Bentham: Trans. Hort. Soc. London, ser. 2, 1: 409, plate 14, fig. 2. (1835) |
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