Lupinus brevicaulis |
Lupinus pachylobus |
|
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sand lupine, short stem blue lupine, short-stem lupine |
big-pod lupine, Mt. Diablo lupine |
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Habit | Herbs, annual, usually less than 1 dm, pubescent, hairs more than 1 mm. | Herbs, annual, 1.5–4 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 4–8 cm; leaflets usually 7, blades 20–25 × 2–5 mm, adaxial surface pubescent. |
Racemes | dense, 3–16-flowered, 1–8 cm; flowers spirally arranged, crowded. |
4–15 cm; flowers usually whorled, sometimes spirally arranged. |
Peduncles | 1–8(–10) cm; bracts persistent, straight, 2–3 mm. |
3–12 cm; bracts deciduous, 6 mm. |
Pedicels | 0.3–1.5 mm. |
1–2.5 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. |
7–9 mm; calyx 4.5–6 mm, lobes ± equal, abaxial lobe entire, adaxial lobe cleft; corolla blue, banner spot white, becoming dark magenta, keel blunt, glabrous, banner length greater than width. |
Legumes | not undulate, 1 cm, thinly pilose to coarsely hirsute. |
± fleshy, 3 × 0.6–0.9 cm, densely pubescent. |
Cotyledons | persistent, disclike, sessile. |
deciduous, petiolate. |
Seeds | 1 or 2, smooth. |
usually 5. |
Lupinus brevicaulis |
Lupinus pachylobus |
|
Phenology | Flowering spring. | Flowering 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.) | 0–600 m. (0–2000 ft.) |
Distribution |
AZ; CA; CO; NM; NV; OR; UT; WY; Mexico (Chihuahua, Sonora)
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CA; WA
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Discussion | Lupinus brevicaulis resembles L. flavoculatus except that its flowers are smaller. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
In California, Lupinus pachylobus occurs from the foothills of the Cascade Range and Sierra Nevada to the outer North and South Coast ranges. In Washington, it is known from the San Juan Islands. It is uncommon and occurs and intergrades with L. bicolor. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Source | FNA vol. 11. | FNA vol. 11. |
Parent taxa | ||
Sibling taxa | ||
Name authority | S. Watson: Botany (Fortieth Parallel), 53, plate 7, figs. 1–4. (1871) | Greene: Pittonia 1: 65. (1887) |
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