Lupinus brevicaulis |
Lupinus microcarpus |
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sand lupine, short stem blue lupine, short-stem lupine |
chick lupine, wide-bannered lupine |
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Habit | Herbs, annual, usually less than 1 dm, pubescent, hairs more than 1 mm. | Herbs, annual, 1–8 dm, sparsely to densely pubescent. | ||||||||
Stems | very short, tufted, branched. |
ascending or erect, branched near base or middle, or unbranched, hollow, at least near base. |
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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 3–15 cm; leaflets 5–9(–11), blades 10–50 × 2–12 mm, adaxial surface glabrous. |
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Racemes | dense, 3–16-flowered, 1–8 cm; flowers spirally arranged, crowded. |
4–60 cm; flowers in crowded to widely spaced whorls. |
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Peduncles | 1–8(–10) cm; bracts persistent, straight, 2–3 mm. |
2–30 cm; bracts persistent, reflexed, 3.5–12 mm. |
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Pedicels | 0.3–1.5 mm. |
0.5–5 mm. |
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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. |
8–18 mm; calyx appendages usually absent, sometimes present, abaxial lobe 5–11 mm, adaxial lobe 2–6 mm; corolla white to dark yellow, pink to dark rose, or lavender to purple, lower wing margins sometimes ciliate, upper margins usually ciliate near claw, upper keel margins usually ciliate near claw, lower margins sometimes ciliate but not as densely. |
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Legumes | not undulate, 1 cm, thinly pilose to coarsely hirsute. |
1–1.8 cm, pubescent. |
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Cotyledons | persistent, disclike, sessile. |
persistent or deciduous (leaving circular scar), disclike, sessile. |
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Seeds | 1 or 2, smooth. |
2, tan to brown, usually mottled, ridged or smooth. |
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Lupinus brevicaulis |
Lupinus microcarpus |
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Phenology | Flowering spring. | |||||||||
Habitat | Sandy washes, open areas, grasslands, pinyon pine-juniper forests, creosote bush scrub, mesquite. | |||||||||
Elevation | 300–2400 m. (1000–7900 ft.) | |||||||||
Distribution |
AZ; CA; CO; NM; NV; OR; UT; WY; Mexico (Chihuahua, Sonora)
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w North America; nw Mexico; South America
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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.) |
Varieties 3 (3 in the flora). Lupinus microcarpus is highly variable and with varieties intergrading. (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 | ||||||||
Sibling taxa | ||||||||||
Subordinate taxa | ||||||||||
Name authority | S. Watson: Botany (Fortieth Parallel), 53, plate 7, figs. 1–4. (1871) | Sims: Bot. Mag. 50: plate 2413. (1823) | ||||||||
Web links |
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